1. The singular solution and the Cauchy problem for generalized Tricomi equation;Weinstein;Comm. Pure Appl. Math.,1954
2. On the Cauchy problem for the Euler–Poisson–Darboux equation;Weinstein;Bull. Amer. Math. Soc.,1953
3. Some properties of solutions of a class of a singular partial differential equations;Altın;Bull. Inst. Math. Acad. Sinica,1983
4. On the iterated wave equation;Krahn;Nederl. Akad. Wetensch. Proc. Ser. A,1957
5. On a class of partial differential equations of even order;Weinstein;Ann. Mat. Pura Appl.,1955