There is no truncation. The idea of morphologically controlled deletion of affixes was introduced by Isačenko [Isačenko, A. V., 1969, “Morpheme Classes, Deep Structure, and the Russian Indeclinables”, “International Journal of Slavic Linguistics and Poetics” 12, pp. 48-72; 1972, “Rol usečenija v russkom slovoobrazo vanii, “International Journal of Slavic Linguistics and Poetics” 15, pp. 95-125; 1973, “Russian Derivations in “-l-“ and “-tel””, “International Journal of Slavic Linguistics and Poetics” 14, pp. 59-95] and Aronoff [Aronoff, Mark,1976, “Word Formation in Generative Grammar”, Linguistic Inquiry Monograph I, M.I.T. Press, Cambridge] also made in its one.
- Kiparsky (2004), Pag. 116