ARENS-MICHAEL ENVELOPES, HOMOLOGICAL EPIMORPHISMS, AND RELATIVELY QUASIFREE ALGEBRAS ArticlePirkovskiĭ A.Yu.Trudy Moskovskogo Matematicheskogo Obshchestva. 2008.
ON THE FREDHOLM AND UNIQUE SOLVABILITY OF NONLOCAL ELLIPTIC PROBLEMS IN MULTIDIMENSIONAL DOMAINS ArticleGurevich P.L., Skubachevskiĭ A.L.Trudy Moskovskogo Matematicheskogo Obshchestva. 2007.