1. Benazzi, M., 1982. Speciation events evidenced in Turbellaria. In: Mechanisms of speciation. (C.Barigozzi, ed.) pp. 307?344. Alan R. Liss Inc., New York.
2. Benazzi, M. & Benazzi Lentati, G., 1976. Platyhelminthes. In: Animal cytogenetics (B.John ed.) Vol. 1: 1?182. Borntraeger, Berlin-Stuttgart.
3. Bickham, J. W. & Baker, R. J., 1979. Canalization model of chromosomal evolution. In: Models and methodologies in evolutionary theory (J. H. Schwartz & H. G. Rollins, eds) 13: 70?84. Bull. Carnegie Mus. Nat. Hist.
4. Curini-Galletti, M., Galleni, L. & Puccinelli, I., 1984a. Karyological analysis of Monocelis fusca, M. lineata (Monocelididae) and Parotoplana macrostyla (Otoplanidae). Helgolander Meeresunters. 37: 171?178.
5. Curini-Galletti, M., Galleni, L., Martens, P. M., Puceinelli, I. & Schockaert, E., 1984b. Karyological observations on Turbellaria Proseriata. Boll. Zool. 51 (Suppl.): 35.