Some difficulties of the determination problem.

[1] [Anonymous], [No title captured]

[2] BAUTZMANN H, 1929, ARCH ENTW MECH, V119

[3] BAUTZMANN H, 1932, VERH AN GES 41 VERS

[4] BAUTZMANN H, 1929, NATURWISSENSCHAFTEN, V17

[5] BECKWITH CJ, 1927, J EXP ZOOL, V49

[6] BRIEN P, 1930, ANN SOC ROY ZOOL BEL, V61

[7] BRIENGAVAGE P, 1927, REC I ZOOL TORLEYROU, V1

[8] CAULLERY M, 1895, B SCI FRANCE BELG, V27

[9] CONKLIN EG, 1897, J MORPH, V13

[10] CONKLIN EG, 1931, J EXP ZOOL, V60

[1] [Anonymous], [No title captured]

[2] BAUTZMANN H, 1929, ARCH ENTW MECH, V119

[3] BAUTZMANN H, 1932, VERH AN GES 41 VERS

[4] BAUTZMANN H, 1929, NATURWISSENSCHAFTEN, V17

[5] BECKWITH CJ, 1927, J EXP ZOOL, V49

[6] BRIEN P, 1930, ANN SOC ROY ZOOL BEL, V61

[7] BRIENGAVAGE P, 1927, REC I ZOOL TORLEYROU, V1

[8] CAULLERY M, 1895, B SCI FRANCE BELG, V27

[9] CONKLIN EG, 1897, J MORPH, V13

[10] CONKLIN EG, 1931, J EXP ZOOL, V60