O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “O reshenii lineinykh odnorodnykh grammatik, porozhdayuschikh lineinye yazyki”, PDM. Prilozhenie, 2024, no. 17, 123–125
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “O reshenii obschego algebraicheskogo uravneniya stepennymi ryadami i prilozhenii v teorii formalnykh grammatik”, PDM, 2023, no. 60, 106–113
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “Analog teoremy Kronekera — Kapelli dlya sistem nekommutativnykh lineinykh uravnenii, porozhdayuschikh lineinye yazyki”, PDM. Prilozhenie, 2023, no. 16, 124–126
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “O polinomialnykh grammatikakh, porozhdayuschikh beskonechnoe mnozhestvo yazykov”, PDM. Prilozhenie, 2022, no. 15, 78–80
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “O reshenii polinomialnykh grammatik i obschego algebraicheskogo uravneniya”, PDM. Prilozhenie, 2021, no. 14, 176–178
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “Geometricheskoe uslovie razreshimosti formalnykh grammatik”, PDM. Prilozhenie, 2020, no. 13, 106–108
I. V. Kolbasina, K. V. Safonov, “Uslovie razreshimosti proizvolnykh formalnykh grammatik”, PDM. Prilozhenie, 2019, no. 12, 196–198
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “Sintaksicheskii analiz programm metodom integralnykh predstavlenii”, PDM. Prilozhenie, 2018, no. 11, 128–130
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “Analog teoremy o neyavnom otobrazhenii dlya formalnykh grammatik”, PDM. Prilozhenie, 2017, no. 10, 149–151
O. I. Egorushkin, I. V. Kolbasina, K. V. Safonov, “O primenenii mnogomernogo kompleksnogo analiza v teorii formalnykh yazykov i grammatik”, PDM, 2017, no. 37, 76–89