Shchogolev Sergiy Avenirovich. The some problems of the theory of oscillations for the differential sysytems, containing slowly varying parameters : д.ф.-м.н. : spec.. 01.01.02 - Диференційні рівняння : presented. 2012-06-05; popup.evolution: .; Taras Shevchenko Kyiv National University. – , 0512U000528.

Updated: 2026-10-23