@book{13482,
	author = {El'sgol'ts, L. E. and Norkin, S. B. and Norkin, S. B. ; jt. auth.},
	title = {Introduction to the theory and application of differential equations with deviating arguments},
	publisher = {Academic Press},
	year = {1973},
	series = {Mathematics in Science and Engineering},
	address = {New York}
}