TY  - JOUR
AU  - V. A. Il'in
AU  - I. Jo
TI  - An estimate of the difference of the partial sums of expansions corresponding to two arbitrary nonnegative selfadjoint extensions of two operators of Sturm--Liouville type for an absolutely continuous function
JO  - Doklady Akademii Nauk
PY  - 1978
SP  - 1381
EP  - 1383
VL  - 243
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1978_243_6_a7/
LA  - ru
ID  - DAN_1978_243_6_a7
ER  -