Grigorieva, Ellina Methods of Solving Number Theory Problems By Ellina Grigorieva. - Cham, Switzerland Birkhäuser 2018 - XXI, 391 p. 24cm. ISBN: 9783319909141 Subjects--Topical Terms: Number theory; Teaching of a specific subject; Mathematical foundations. Dewey Class. No.: 512.7 / GRI/M