Internet : https://en.wikipedia.org/wiki/Mikhail_Agranovich_(mathematician) (2018-11-26)
Internet : https://prabook.com/web/mikhail_semenovich.agranovich/3488774 (2018-11-26)
Partial differential equations. IX, Elliptic boundary value problems / M. S. Agranovich,
Yu. V. Egorov, M. A. Shubin (eds), 1997