@article { BrzobohatyNP13, title = {Experimental demonstration of optical transport, sorting and self-arrangement using a {\textquoteleft}tractor beam{\textquoteright}}, journal = {Nature Photon.}, volume = {7}, number = {2}, year = {2013}, pages = {123-127}, keywords = {MF}, doi = {10.1038/nphoton.2012.332}, author = {Oto Brzobohat{\'y} and V{\'\i}t{\v e}zslav Kar{\'a}sek and M {\v S}iler and Luk{\'a}{\v s} Chv{\'a}tal and Tom{\'a}{\v s} {\v C}i{\v z}m{\'a}r and P. Zem{\'a}nek} }