@book{114019,
	author = {Proceedings of the summer workshop in high energy physics and cosmology and Jengo R.},
	title = {Superstrings, unified theories and cosmology /},
	publisher = {World scientific,},
	year = {1986.},
	series = {The ICTP series in theoretical physics},
	address = {Singapore :},
	edition = {1a ed.},
	note = {hay tres volumenes de diferente año}
}