TY - BOOK AU - Hinch, E. J TI - Perturbation methods SN - 9780521378970 SN - 91213726 U1 - 515.35 HIN PY - 1991/// CY - Cambridge PB - Cambridge University Press KW - Perturbation (Mathematics) N1 - Includes bibliographical references (p. 155-157) and index ER -