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
Medvedeva N. V., Titov S. S. «Analogues of the shannon theorem for non-minimal endomorphic perfect ciphers» // Applied Discrete Mathematics. Supplement 2016. №9 C.62-65
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
Medvedeva N. V., Titov S. S. «Geometric model of perfect ciphers with three cipher plaintext values» // Applied Discrete Mathematics. Supplement 2019. №12 C.113-116
