@book{17143,
	author = {International School of Mathematical Physics, Erice, June l-15, 1980 and Velo, G. ; ed.},
	title = {Rigorous atomic and molecular physics; proceedings},
	publisher = {Plenum},
	year = {1981},
	series = {NATO Advanced Study Institutes series-B, Physics},
	address = {New York}
}