@article {CasaburiOC05,
	title = {Two-and three-beam interferometric optical tweezers},
	journal = {Opt. Commun.},
	volume = {251},
	year = {2005},
	pages = {393{\textendash}404},
	keywords = {MF},
	doi = {10.1016/j.optcom.2005.03.029},
	author = {A. Casaburi and G. Pesce and P. Zem{\'a}nek and A. Sasso}
}
