On the uniqueness of the Cauchy problem for semi-elliptic partial differential equations, III
1963 ◽
Vol 17
(2)
◽
pp. 153-163
1962 ◽
Vol 15
(2)
◽
pp. 171-177
1975 ◽
Vol 27
(4)
◽
pp. 517-532
1970 ◽
Vol 38
(3)
◽
pp. 178-188
◽