Man'ko Stepan Stepanovych. Asymptotic expansions of spectra for differential operators of the second and fourth order with singular coefficients : к.ф.-м.н. : spec.. 01.01.02 - Диференційні рівняння : presented. 2011-09-15; popup.evolution: .; Ivan Franko National University of Lviv. – , 0411U004648.

Updated: 2026-11-08