Handbook of Differential Equations: Ordinary Differential Equations, 4

RONTÓ, A., RONTO, M. Successive Approximation Techniques in Non-Linear Boundary Value Problems. In: BATTELLI, F., FEČKAN, M., eds. Handbook of Differential Equations: Ordinary Differential Equations, 4. 4. New York: Elsevier, 2009, s. 441-592. ISBN 978-0-444-53031-8.