TY - BOOK AU - Lakshmikantham,V. AU - Leela,S. AU - Vatsala,A.S. TI - Theory of differential equations in cones SN - 9781904868965 (Cloth) PY - 2011/// CY - Cambridge PB - Cambridge Scientific Publishers KW - Differential equations N1 - Includes bibliographical references (p. 275-281) and index ER -