- A criterion for parametrical completeness in the 4-valued extension of modal logic S5.
Vadim Cebotari, Buletinul AŞM. Matematica, №1(35), Chişinău, 2001, p.71-77. - Criterion of parametrical completeness in 6-element non-chian extension of Intuitionistiic logic of A. Heyting.
Vadim Cebotari, Buletinul AŞM. Matematica, № 3(52), Chişinău, 2006, p.45-50.
- Mathematical Society of the Republic of Moldova.