@book{247175,
	author = {Arnaboldi, Valerio, and Passarella, Andrea,},
	title = {Online social networks : human cognitive constraints in Facebook and Twitter personal graphs / },
	publisher = {Elsevier,},
	year = {2015.},
	series = {Computer science reviews and trends},
	address = {Amsterdam, Netherlands :},
	url = {http://www.sciencedirect.com/science/book/9780128030233}
}