Margulis L. (1982). Early Life. Boston: Science Books International.

2. Снег и подснежное пространство

Bentley W. A. and W. J. Humphreys (1931). Snow Crystals. New York: McGraw-Hill.

Blanchard D. C. (1998). The Snowflake Man. Blacksburg, Va.: McDonald and Woodward Publishers.

Borland Hal. (1971). A lifetime of snowflakes. Audubon 73. P. 59–65.

Burlington Free Press (1931). Bentley’s contribution. Burlington Free Press. December 24.

Court G. (1998). Winter grays. Natural History (February). P. 50–54.

Marchand P. J. (1993). The underside of winter. Natural History (February). P. 51–56.

Pruitt W. O., Jr. (1960). Animals of the North. New York: Harper and Row.

Thaler E. (1982). Ornithologisches in Schnee. Dic Gefiederte Welt (March). P. 90–92.

3. Прогулка в конце зимы

Benkman C. W. (1987). Food profitability and the foraging ecology of crossbills. Ecological Monographs 57(3). P. 251–267.

_. (1989). On the evolution and ecology of island populations of crossbills. Evolution 43. P. 1324–1330.

_. (1990). Intake rates and the timing of crossbill reproduction. Auk 197. P. 376–386.

Bent A. C. (1968). Life Histories of North American Cardinals, Grosbeaks, Buntings, Towhees, Finches, Sparrows, and Allies. Part I. New York: Dover Publications.

Grinnell J. (1900). Birds of the Kotzebue Sound region. Pacific Coast Avifauna, No. 1.

Macoun J. (1909). Catalogue of Canadian Birds, 2nd edition.

Palmer R. S. (1949). Maine birds. Bull. Mus. Camp. Zool. Vol. 102.

Porter E. (1966). Summer Island. New York: Balentine Books. P. 78.

Smith B. E. (1949). White-winged crossbills nesting in Maine. Maine Audubon Soc. Bull. 5. P. 12–13.

Stone W. (1937). Bird Studies at Old Cape May. Vol. II. New York: Dover Publications.

Tufts H. F. (1906). Nesting of crossbills in Nova Scotia. Auk 23. P. 339–340.

4. По следу ласки

Sandell M. (1988). Stop-and-go stoats. Natural History (June). P. 55–64.

Snyder D. P. (1982). Tamias striatus // Mammalian Species. The American Society of Mammalogists. No. 168. P. 1–8.

5. Гнезда и норы

Frazier A. and V. Nolan. (1959). Communal roosting by the Eastern Bluebird in winter. Bird Banding 30. P. 219–226.

Ghalambor C. K. and T. E. Martin. (1999). Red-breasted Nuthatch (Sitta canadensis) // The Birds of North America. Ed. A. Poole and F. Gill. No. 459. Philadephia: The Birds of North America, Inc.

Guntert M., D. Hay, and R. P. Balda. (1988). Communal roosting in the Pygmy Nuthatch: A winter survival strategy. Proc. Intern. Ornthol. Congr. 19. P. 1964–1972.

Headstrom R. (1970). A Complete Field Guide to Nests in the United States. New York: Ives Washburn, Inc.

Heinrich B. (1994). Bald-faced hunters // In a Patch of Fireweed. Cambridge, Mass.: Harvard University Press. P. 152–162.

Ingold J. L. and R. Galati. (1997). Golden-crowned kinglet (Regulus satrapa) // The Birds of North America. Ed. A. Poole and F. Gill. No. 301. Philadelphia: The Birds of North America, Inc.

Knorr O. A. (1957). Communal roosting of the Pygmy Nuthatch. Condor 59. P. 398.

Pitts T. D. (1976). Fall and winter roosting habits of Carolina chickadees. Wilson Bull. 88. P. 603–610.

Rogers L. (1981). A bear in its lair. Natural History 90 (October). P. 64–70.

Thaler E. (1990). Die Goldhähnchen. Wittenberg Lutherstadt: A. Ziemsen Verlag.

Walsberg G. E. (1990). Communal roosting in a very small bird: Consequences for the thermal and respiratory gas environments. Condor 92. P. 795–798.

White F. N., G. A. Bartholomew, and J. L. Kinney. (1975). The thermal significance of the nest of the sociable weaver, Philetairus socius: winter observations. Ibis 117. P. 171–179.

6. Обжимания у летяг

Cowan I. Mc T. (1936). Nesting habits of the flying squirrel. Canadian Field Naturalist 46. P. 58–60.

DeCoursey P. J. (1961). Effect of light on the circadian activity rhythms of the flying squirrel, Glaucomys volans. Z. Vergl. Physiol. 44. P. 331–354.

Dunlap J. C. (1999). Molecular bases for circadian clocks. Cell 96. P. 271–290.

French A. R. (1977). Circannual rhythmicity and entrainment of surface activity in the hibernator, Perognathus longimembris. J. Mammal. 58. P. 37–43.

Heinrichs J. (1983). The winged snail darter. J. Forestry 81. P. 212–215, 262.

Maser C., R. Anderson, and E. N. Bull. (1981). Aggregation and sex segregation in northern flying squirrels in northeastern Oregon, an observation. Murrelet 62. P. 54–55.

_, J. M. Trappe, and R. A. Nausebaum. (1978). Fungalsmall mammal interrelationships with emphasis on Oregon coniferous forests. Ecology 59. P. 799–809.

McShea W. J., and D. M. Madison. (1984). Communal nesting between reproductively active females in a spring population of Microtus pennsylvanicus. Can. J. Zool. 62. P. 344–346.

Muul I. (1968). Behavioral and physiological influences on the distributions of the flying squirrels, Glaucomys volans. Misc. Publ. Mus. Zool., Univ. Michigan 134. P. 1–66.

Osgood F. L. (1935). Apparent segregation of sexes in flying squirrels. J. Mammal. 16. P. 236.

Rust H. J. (1946). Mammals of northern Idaho. J. Mammal. 27. P. 308–327.

Weigl P. D. and D. W. Osgood. (1974). Study of northern flying squirrel, Glaucomys sabrinus, by temperature telemetry. Amer. Midland Naturalist. 92. P. 482–486.

Wells-Gosling N. and L. R. Heaney. (1984). Glaucomys sabrinus // Mammalian Species, No. 229. P. 1–8.

Young M. W. (2000). The tick-tock of the biological clock. Scientific American (March). P. 64–77.

7. Беличьи в спячке (просыпаются, чтобы поспать)

Adolph E. F. (1951). Responses to hypothermia in several species of infant mammals. Am. J. Physiol. 166. P. 75–91.

Barnes B. M. (1989). Freeze avoidance in a mammal: body temperatures below 0 °C in an Arctic Hibernator. Science 244. P. 1593–1595.

_. (1996). Sang froid. The Sciences (September/October). P. 12–14.