TY  - JOUR 
T1  - The Influence of Self-fertilization performance and Copulation Behaviour in Reproduction by Cross-fertilization in Groups of Biomphalaria tenagophila (Mollusca, Planorbidae)
JO  - Memórias do Instituto Oswaldo Cruz
A1  - Freitas, June Springer de
A1  - Paula, Débora Pires
A1  - Cariello, Mariana Otero
SN  - 0074-0276
UL  - 10.1590/S0074-02761997000600003
VL  - 92 
Y1  - 1997
PB  - Brasil 
ER  -