TY  - JOUR 
T1  - Ultrastructure of the midgut endocrine cells in Melipona quadrifasciata anthidioides (Hymenoptera, Apidae)
JO  - Brazilian Journal of Biology
A1  - Neves, C. A.
A1  - Gitirana, L. B.
A1  - Serrão, J. E.
SN  - 1519-6984
UL  - 10.1590/S1519-69842003000400015
VL  - 63 
Y1  - 2003
PB  - Brasil 
ER  -