LOBOV, A.; BABKINA, I.; MALTSEVA, A.; MIKHAILOVA, N.; GRANOVITCH, A. Proteins of penial mamilliform glands in closely related <em>Littorina</em&gt; species (Mollusca, Caenogastropoda): variability and possible contribution to reproductive isolation. Biological Communications, v. 65, n. 2, p. 200–212, 5 Jun. 2020.