Pimentel, Edgard A. Elliptic regularity theory by approximation methods / Edgard A. Pimentel - Cambridge Cambridge University Press 2022 - xi, 190 p, 23 cm. - London Mathematical Society; Lecture Note Series 477 . Atlantic3012267/01£ 60.00 ISBN: 9781009096669 (pbk.) Subjects--Topical Terms: Pimentel, Edgard A. Dewey Class. No.: 515.983 PIM