1. Water waves over a channel of finite depth with a dock;Heins, Albert E.;Amer. J. Math.,1948
2. Water waves over a channel of finite depth with a submerged plane barrier;Heins, Albert E.;Canad. J. Math.,1950
3. Some remarks on the coupling of two ducts;Heins, Albert E.;J. Math. Physics,1951
4. Surface waves in water of variable depth;Stoker, J. J.;Quart. Appl. Math.,1947
5. R. E. A. C. Paley and N. Wiener, The Fourier Transform in the Complex Domain, American Mathematical Society Colloquium Publication, 1934, Chapter IV.