- L. W Ehrlich. A numerical
method of solving a heat flow problem with moving boundary.
Journal of the ACM, 5(2):161-176, April 1958.
- Louis W. Ehrlich. Monte
Carlo solutions of boundary value problems involving the difference
analogue of \frac{\partial^2u}{\partial x^2} +
\frac{\partial^2u}{\partial y^2} + \frac{K}{y}\frac{\partial u}{\partial
y} = 0. Journal of the ACM, 6(2):204-218, April 1959.