Citation: Sr. Czapor et al., Complete solution of Hadamard's problem for the scalar wave equation on Petrov type III space-times, ANN IHP-PHY, 71(6), 1999, pp. 595-620
Citation: Wg. Anderson et al., Huygens' principle for the non-self-adjoint scalar wave equation on Petrovtype III space-times, ANN IHP-PHY, 70(3), 1999, pp. 259-276