@book{15392,
	author = {International Workshop and OJ Meeting and Takalo, L., ed. and Perugia University Observatory},
	title = {Multifrequency monitoring of blazars},
	publisher = {Perugia University Observatory},
	year = {1998},
	series = {Perugia University Observatory Publications: v. 3},
	address = {Perugia}
}