1. Bondi, C., 1963. Osservazioni sulla morfologia e sulla fine struttura del nemasperma di Branchiobdella pentodonta (Whitman) esasminato al microscopio elettronico. Riv. Biol. 56: 21–48.
2. Bondi, C. & R. M. Farnesi, 1976. Electron microscope studies of spermatogenesis in Branchiobdella pentodonta Whitman (Annelida, Oligochaeta). J. Morph. 148: 65–88.
3. Boshko, E. G., 1983. Crayfish oligochaetes in the waterbodies of the Ukraine. Report I. Branchiobdellidae. Vestn. Zool. 7: 13–20.
4. Brinkhurst, R. O. & S. R. Gelder, 1991. Chapter 12. Annelida: Oligochaeta and Branchiobdellida. In J. H. Thorpe & F. Covitch (eds), Ecology and Classification of North American Freshwater Invertebrates. Academic Press, New York: 401–435.
5. Daddow, L. Y. M., 1983. A double lead stain method for enhancing contrast of ultrathin sections in electron microscopy: a modified multiple staining technique. J. Micros. 129: 147–153.