1. A rigorous derivation of some invariant imbedding equations of transport theory;Bailey;J. Math. Anal. Appl.,1964
2. Invariant imbedding and neutron transport theory IV. Generalized transport theory;Bellman;J. Math. Mech.,1959
3. Invariant imbedding and mathematical physics I, Particle processes;Bellman;J. Math. Phys.,1960
4. An Introduction to Transport Theory;Wing,1962
5. On the fundamental equations of invariant imbedding I;Bellman,1961