1. MAUL P.R. (1977). Private Communication.
2. Solutions of the two-dimensional diffusion equations;Rounds;Transactions American Geophysical Union,1955
3. Numerical treatment of time dependent advection and diffusion of air pollutants;Runca;Atmos. Environ.,1975
4. Propagation of an impurity from a high altitude source;Tseytin;Trudy Leningr. Gidromet. In-ta,1963