Energy and momentum flux in a high-numerical-aperture beam using the extended Nijboer-Zernike diffraction formalismJoseph J. M. Braat, Sven van Haver, Augustus J. E. M. Janssen and Peter DirksenJ. Eur. Opt. Soc.-Rapid Publ., 2 (2007) 07032DOI: https://doi.org/10.2971/jeos.2007.07032
