SW Selected works by Petrovskiĭ, I. G., (Ivan Georgievich), Oleinik, O. A., Yosifian, G. A. fromClassics of Soviet Mathematics Series, 0743-9199 0 Type: Book
SW Selected works by Oleinik, O. A., Yosifan, G. A., Petrovskii, I. G. fromClassics of Soviet Mathematics Series, 0743-9199 0 Type: Book
