TY  - JOUR 
T1  - Comparative anatomy of the male reproductive internal organs of 51 species of bees
JO  - Neotropical Entomology
A1  - Ferreira, Amilton
A1  - Abdalla, Fábio C.
A1  - Kerr, Warwick E.
A1  - Cruz-Landim, Carminda da
SN  - 1519-566X
UL  - 10.1590/S1519-566X2004000500005
VL  - 33 
Y1  - 2004
PB  - Brasil 
ER  -