Bengt Fornberg. A finite difference method for free boundary problems. J. Computational Applied Mathematics, 233(11):2831-2840, 2010. [doi]
@article{Fornberg10, title = {A finite difference method for free boundary problems}, author = {Bengt Fornberg}, year = {2010}, doi = {10.1016/j.cam.2009.11.028}, url = {http://dx.doi.org/10.1016/j.cam.2009.11.028}, researchr = {https://researchr.org/publication/Fornberg10}, cites = {0}, citedby = {0}, journal = {J. Computational Applied Mathematics}, volume = {233}, number = {11}, pages = {2831-2840}, }