Jian-Qiang Sun, Xiao-yan Gu, Xun-Feng Hu. Geometric integration of the paraxial equation. Applied Mathematics and Computation, 218(7):3149-3157, 2011. [doi]
@article{SunGH11-1, title = {Geometric integration of the paraxial equation}, author = {Jian-Qiang Sun and Xiao-yan Gu and Xun-Feng Hu}, year = {2011}, doi = {10.1016/j.amc.2011.08.048}, url = {http://dx.doi.org/10.1016/j.amc.2011.08.048}, researchr = {https://researchr.org/publication/SunGH11-1}, cites = {0}, citedby = {0}, journal = {Applied Mathematics and Computation}, volume = {218}, number = {7}, pages = {3149-3157}, }