Reference

I.K. Alekperov (1989): [The revision of the *Bakuella* #Agamaliev# et #Alekperov# 1976 and *Keronella* #Wiackowski# 1985 genera (Hypotrichida, Ciliophora). In: #Poljansky G.I., Zhukov B.F. & Raikov# I.B. (eds.): Ecology of marine and freshwater Protozoa] $[in Russian] – Yaroslavl – : 7.