TY  - JOUR
AU  - Dmitri R. Yafaev
TI  - Second-Order Differential Operators in the Limit Circle Case
JO  - Symmetry, integrability and geometry: methods and applications
PY  - 2021
VL  - 17
UR  - http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a76/
LA  - en
ID  - SIGMA_2021_17_a76
ER  -