TY  - JOUR
AU  - G. A. Kalyabin
TI  - On the number of solutions of a self-adjoint system of second-order differential equations in $L_2(0,\infty)$
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1972
SP  - 74
EP  - 76
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1972_6_3_a14/
LA  - ru
ID  - FAA_1972_6_3_a14
ER  -