@book{19531,
	author = {Ames, William F.},
	title = {Numerical methods for partial differential equations},
	publisher = {Nelson,},
	year = {1969.},
	series = {Applications of mathematics. Unnumbered.},
	address = {London,},
	url = {http://www.gbv.de/dms/bowker/toc/9780177616198.pdf}
}