The cooling effect of the airbags in birds

[1] Baer, 1896, Z WISS ZOOL, V61, P420

[2] BAER M, 1897, BIOL ZENTRALB, V17, P282

[3] BOAS, 1894, LEHRBUCH ZOOLOGIE, P484

[4] GADOW, 1891, KLASSEN ORDNUNGEN, V6, P749

[5] GEGENBAUR, 1901, VERGLEICHENDE ANATOM, P321

[6] LANDOLT, 1894, PHYS CHEM TABELLEN, P11

[7] LAPPEY, 1847, RECHERCHES APPAREIL

[8] LENDENFELD, 1896, BIOL ZENTRALBL, V16, P774

[9] MAGNUS, 1869, ARCH ANAT PHYS, P207

[10] Muller B., 1908, SMITHSONIAN MISCELLA, V50, P365

[1] Baer, 1896, Z WISS ZOOL, V61, P420

[2] BAER M, 1897, BIOL ZENTRALB, V17, P282

[3] BOAS, 1894, LEHRBUCH ZOOLOGIE, P484

[4] GADOW, 1891, KLASSEN ORDNUNGEN, V6, P749

[5] GEGENBAUR, 1901, VERGLEICHENDE ANATOM, P321

[6] LANDOLT, 1894, PHYS CHEM TABELLEN, P11

[7] LAPPEY, 1847, RECHERCHES APPAREIL

[8] LENDENFELD, 1896, BIOL ZENTRALBL, V16, P774

[9] MAGNUS, 1869, ARCH ANAT PHYS, P207

[10] Muller B., 1908, SMITHSONIAN MISCELLA, V50, P365