@article {377721,
	title = {Three-dimensional bioprinting of thick vascularized tissues},
	journal = {PNAS},
	volume = {113},
	number = {12},
	year = {2016},
	pages = {3179-3184},
	author = {D. B. Kolesky and K. A. Homan and M. A. Skylar-Scott and J. A. Lewis}
}
