%0 Journal Article %T M. I. Gordin on Doeblin and on Doeblin–Fortet work (excerpts from letters) %J Zapiski Nauchnykh Seminarov POMI %D 2015 %P 13-16 %V 441 %U http://geodesic.mathdoc.fr/item/ZNSL_2015_441_a2/ %G ru %F ZNSL_2015_441_a2