@article {1999,
	title = {Asymptotic behaviour of nonlinear elliptic higher order equations in perforated domains},
	journal = {Journal d\\\'Analyse Mathematique,  Volume 79, 1999, Pages: 63-112},
	year = {1999},
	isbn = {1618-1891},
	doi = {10.1007/BF01759365},
	url = {http://hdl.handle.net/1963/6433},
	author = {Gianni Dal Maso and Igor V. Skrypnik}
}
