Xu F, Ren K, Gouesbet G, Cai X, Gréhan G. Theoretical prediction of radiation pressure force exerted on a spheroid by an arbitrarily shaped beam. Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Feb;75(2 Pt 2):026613. doi: 10.1103/physreve.75.026613. PMID: 17358442.