1. Developments in neutron transport theory;Bell,1965
2. On calculating weak solutions of quasi-linear, first-order partial differential equations;Douglis;Contrib. Differential Eqs.,1963
3. Properties of weak solutions of generalized radial transport equations;Douglis;J. Differential Eqs.,1965
4. The solutions of multi-dimensional generalized transport equations and their calculation by difference methods;Douglis,1966
5. The Theory of Functions of Real Variables;Graves,1956