@article {Pellegrini2014,
	title = {Charge-density-wave surface phase slips and noncontact nanofriction},
	journal = {Physical Review B},
	volume = {89},
	number = {24},
	year = {2014},
	month = {jun},
	pages = {245416},
	doi = {10.1103/PhysRevB.89.245416},
	author = {Pellegrini, Franco and Santoro, Giuseppe E. and Tosatti, Erio}
}
