@book{1813910,
	author = {Guri I. Marchuk; Victor P. Shutyaev; Valeri I. Agoshkov},
	title = {Adjoint Equations and Perturbation Algorithms in Nonlinear Problems},
	publisher = {Taylor and Francis},
	url = {http://www.taylorfrancis.com/books/9781315136707}
}