@article{yafaev:hal-03327383,
TITLE = {Second-Order Differential Operators in the Limit Circle Case},
AUTHOR = {Yafaev, Dmitri},
URL = {https://hal.science/hal-03327383},
JOURNAL = {Symmetry, Integrability and Geometry : Methods and Applications},
PUBLISHER = {National Academy of Science of Ukraine},
VOLUME = {17},
PAGES = {article n{\textdegree} 77},
YEAR = {2021},
MONTH = Aug, DOI = {10.3842/SIGMA.2021.077},
HAL_ID = {hal-03327383},
HAL_VERSION = {v1},
}