TY  - JOUR
AU  - V. A. Il'in
AU  - I. Jo
TI  - Estimation of the difference of partial sums of expansions corresponding to two arbitrary nonnegative selfadjoint extensions of two operators of Sturm--Liouville
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 1175
EP  - 1193
VL  - 15
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_7_a2/
LA  - ru
ID  - DE_1979_15_7_a2
ER  -