@article {Ancilotto2013,
	title = {Supersolid structure and excitation spectrum of soft-core bosons in three dimensions},
	journal = {Physical Review A},
	volume = {88},
	number = {3},
	year = {2013},
	month = {sep},
	pages = {033618},
	doi = {10.1103/PhysRevA.88.033618},
	author = {Ancilotto, Francesco and Rossi, Maurizio and Toigo, Flavio}
}
