“ASYMPTOTICS OF THE EIGENVALUES OF A PERIODIC BOUNDARY VALUE PROBLEM FOR A DIFFERENTIAL OPERATOR OF ODD ORDER WITH SUMMABLE OPERATOR” (2021) ҚазҰУ Хабаршысы. Математика, механика, информатика сериясы, 110(2), pp. 3–17. doi:10.26577/JMMCS.2021.v110.i2.01.