@article{PismaZhETF.33.658, title = {Superheavy magnetic monopoles and decay of the proton}, author = {Rubakov, V. A.}, journal = {πΙΣΨΝΑ Χ φότζ}, volume = {33}, issue = {12}, pages = {658}, year = {1981}, doi = {}, url = {http://jetpletters.ru/ps/0/article_23107.shtml}, }