Filippov, A. F. Justification of high-frequency asymptotics in the three-dimensional diffraction problem. (English) Zbl 0198.13402 Sib. Math. J. 10(1969), 1043-1055 (1970). PDFBibTeX XMLCite \textit{A. F. Filippov}, Sib. Math. J. 10, 1043--1055 (1970; Zbl 0198.13402) Full Text: DOI
Filippov, A. F. The uniqueness of generalized solutions. (English) Zbl 0183.11004 Sib. Math. J. 10, 152-155 (1969). PDFBibTeX XMLCite \textit{A. F. Filippov}, Sib. Math. J. 10, 152--155 (1969; Zbl 0183.11004) Full Text: DOI