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2. Снег и подснежное пространство
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3. Прогулка в конце зимы
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4. По следу ласки
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5. Гнезда и норы
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6. Обжимания у летяг
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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.
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