1. Bautz, A., 1977. Structure fine de l’epiderme chez des planaires triclades terrestres et paludicoles. Arch. Zool. Exp. gén. 118: 155–172.
2. Bedini, C., Ferrero, E.,& Lanfranchi, A., 1973. The ultrastruc¬ture of ciliary sensory cells in two Turbellaria Acoela. Tissue Cell 5: 359–372.
3. Bedini, C., Ferrero, E.,& Lanfranchi, A., 1975. Fine structural observations on the ciliary receptors in the epidermis of three otoplanid species (Turbellaria, Proseriata). Tissue Cell 7: 253–266.
4. Bedini, C.,& Papi, F., 1974. Fine structure of the turbellarian epidermis. In: Ed. Riser, N. W. and Morse, M. P. Biology of the Turbellaria. New York: McGraw Hill.
5. Bowen, I. D.,& Ryder, T. A., 1974. The fine structure of the planarian Polycelis tenuis (Iijima) iii: The epidermis and external features. Protoplasma 80: 381–392.