Annals of Mathematics · 1951 · 880 citations · 3 references
Singular Diffusion ProblemsDiffusion ProcessAnomalous DiffusionSingularly Perturbed Problem
3
Random Walk and the Theory of Brownian Motion
Mark Kac · American Mathematical Monthly · 1947 · 482 citations
Bernard Friedman · Communications on Pure and Applied Mathematics · 1949 · 181 citations