@article {PapanikolaouBSDZS11,
	title = {Universality beyond power laws and the average avalanche shape},
	journal = {Nature Physics},
	volume = {7},
	year = {2011},
	pages = {316-320},
	doi = {10.1038/NPHYS1884},
	author = {Stefanos Papanikolaou and Felipe Bohn and Rubem Luis Sommer and Gianfranco Durin and Stefano Zapperi and James P. Sethna}
}
