@article{PismaZhETF.53.150, title = {Closed Abrikosov vortices in type-II superconductors}, author = {Kozlov, V. A. and Samokhvalov, A. V.}, journal = {πΙΣΨΝΑ Χ φότζ}, volume = {53}, issue = {3}, pages = {150}, year = {1991}, doi = {}, url = {http://jetpletters.ru/ps/0/article_17378.shtml}, }