Titov S. S., Medvedeva N. V. «On non-minimal perfect ciphers» // 2013. №6 (Приложение) C.42-44
Titov S. S., Medvedeva N. V. «On non-minimal perfect ciphers» // 2013. №6 C.42-44
Medvedeva Natalya V., Titov Sergey S. «Description of non-endomorphic maximum perfect ciphers with two-valued plaintext alphabet» // Applied Discrete Mathematics 2015. №4(30) C.43-55
Titov S. S., Medvedeva N. V. «Constructions of non-endomorphic perfect ciphers» // Applied Discrete Mathematics. Supplement 2020. №13 C.51-54
Medvedeva Natalia A., Titov Sergey S. «The criterion of minimum perfect ciphers with respect to inclusion» // Applied Discrete Mathematics. Supplement 2022. №15 C.51-54
Titov S. S., Medvedeva N. V. «Non-endomorphic perfect ciphers with two elements in plaintext alphabet» // Applied Discrete Mathematics. Supplement 2015. №8 C.63-66
Titov S. S., Medvedeva N. V. «To the task of description minimal by inclusion perfect ciphers» // Applied Discrete Mathematics. Supplement 2021. №14 C.91-95
Titov S. S., Medvedeva N. V. «Geometric model of perfect ciphers with three cipher plaintext values» // Applied Discrete Mathematics. Supplement 2019. №12 C.113-116
