@article { JaklJOPAA07,
	title = {Axial optical trap stiffness influenced by retro-reflected beam},
	journal = {J. Opt. A: Pure Appl. Opt.},
	volume = {9},
	number = {8, Sp. Iss. SI},
	year = {2007},
	pages = {S251{\textendash}S255},
	keywords = {MF},
	issn = {1464-4258},
	doi = {10.1088/1464-4258/9/8/S19},
	author = {P J{\'a}kl and M. {\v S}er{\'y} and J Je{\v z}ek and M. Li{\v s}ka and P. Zem{\'a}nek}
}
