@article { SilerJQSRT13b, title = {Optical forces in a non-diffracting vortex beam}, journal = {J. Quant. Spectrosc. Radiat. Transf.}, volume = {126}, year = {2013}, pages = {78-83}, keywords = {MF}, doi = {10.1016/j.jqsrt.2012.08.030}, author = {M {\v S}iler and P. Zem{\'a}nek} }