[1]
Koshanov, B.D. and Soldatov, A. 2018. On the solvability of the boundary value problems for the elliptic equation of high order on a plane. Bulletin of the Karaganda University. Mathematics Series. 91, 3 (Sep. 2018), 24–30. DOI:https://doi.org/10.31489/2018m3/24-30.