@article{Foreman2011, 
author = {Foreman, M. R. and T\"{o}r\"{o}k, P.}, 
journal = {New J. Phys.}, 
pages = {063041}, 
title = {Spin-orbit coupling and conservation of angular momentum flux in non-paraxial imaging of forbidden radiation}, 
volume = {13}, 
year = {2011},
doi = {10.1088/1367-2630/13/6/063041},
}