@book{190607,
	author = {Francqui Colloquium and Henneaux, Marc.},
	title = {Strings and gravity},
	publisher = {De Boeck & Larcier},
	year = {2003.},
	series = {Bibliothèque scientifique Francqui = Francqui scientific library},
	address = {Bruxelles}
}