ON ISOTOPY OF BOL ALGEBRAS Статья Bouetou Thomas B., Mikheev Pavel O. Webs & quasigroups. Tver State Univ., Tverʹ. 1994. С. 47-49
ON THE CONTINUATION OF INCOMPATIBLE CLASSES OF BOOLEAN TABLES FROM FRAGMENTS OF IDENTICAL WIDTH Статья Baranov A.V. Algebraic and logical constructions (Russian). Tver. Gos. Univ., Tverʹ. 1994. С. 27-31