Gut Vitalii Mykhaylovych. Asymptotic expansions of spectra for elliptic differential operators of the second and fourth orders with singular coefficients : к.ф.-м.н. : spec.. 01.01.02 - Диференційні рівняння : presented. 2015-11-13; popup.evolution: .; Ivan Franko National University of Lviv. – , 0415U006256.

Updated: 2026-11-07