On a generalization of Hilbert's 21st problem Richard M. Hain (1986) Annales scientifiques de l'École Normale Supérieure
On a mixed boundary values problem for Lavrentev type equations A. Mamourian (1985) Annales Polonici Mathematici
On factorization and partial indices of unitary matrix-functions of one class. Janashia, G., Lagvilava, E. (1997) Georgian Mathematical Journal
On the associative Nijenhuis relation. Ebrahimi-Fard, Kurusch (2004) The Electronic Journal of Combinatorics [electronic only]
On the Riemann-Hilbert problem in the domain with a nonsmooth boundary. Kokilashvili, V., Paatashvili, V. (1997) Georgian Mathematical Journal