Kolbasina I.V., Safonov K. V., Egorushkin O.I. «Geometric condition of formal grammars solvability» // Applied Discrete Mathematics. Supplement 2020. №13 C.106-108
Kolbasina I. V., Safonov K. V., Egorushkin O.I. «On consistency of systems of symbolic polynomial equations and their application» // Applied Discrete Mathematics. Supplement 2016. №9 C.119-121
Kolbasina I. V., Safonov K. V., Egorushkin O.I. «An analogue of implicit mapping theorem to formal grammars» // Applied Discrete Mathematics. Supplement 2017. №10 C.149-151
Safonov K. V., Kolbasina I. V. «A solvability condition for arbitrary formal grammars» // Applied Discrete Mathematics. Supplement 2019. №12 C.196-198
