1. Punin, M.Yu., Endocrine-Like Elements in the Intestinal Epithelium of Invertebrate Animals,Tsitologiya, 1986, vol. 28, pp. 1035–1055.
2. Punin, M.Yu., System of Regulatory Elements in the Epithelium of the Alimentary Tract of Invertebrate Animals,Tsitologiya, 1993, vol. 35, pp. 3–26.
3. Punin, M.Yu., System of Regulatory (Endocrine and Nerve) Cells in the Intestinal Epithelium of Invertebrate Animals,I (XI) Mezhdunarodnoe soveshchanie po evolyutsionnoi fiziologii: Tezisy dokladov (I (XI) International Conference on Evolutionary Physiology: Abstracts of Reports), St. Petersburg, 1996, pp. 1989–199.
4. Clark, M.E., Histochemical Localization of Monoamines in the Nervous System of the Polychaete Nephtys,Proc. Roy. Soc. London, 1966, vol. B165, pp. 308–325.
5. Welsch, U. and Stocrh, V., Histochemical and Fine Structural Observations on the Alimentary Tract of the Aphroditidae and Nephtyidae (Polychaeta, Errantia),Mar. Biol., 1970, vol. 6, pp. 143–147.