@book{19772,
	author = {Encyclopedia of Mathematics and its applications and Stormark, Olle},
	title = {Lie's structural approach to PDE systems},
	publisher = {Cambridge University Press,},
	year = {2000},
	series = {Encyclopedia of Mathematics and its applications},
	address = {Cambridge:},
	note = {"Purchased under NBHM grant for the year 1999-2000"}
}