Panova Galina I. «Morphological Form and Word Form: On Clarifying the Basic Notions of Russian Morphology» // Tomsk State University Journal of Philology 2021. №73 C.72-92
Shihiev Sh. B., Mirzabekov Ya. M. «Formal grammar of Russian language in examples» // Applied Discrete Mathematics 2018. №40 C.114-126