References
- Hewgill , D. 1973 . An antilocal elliptic operator . J. Math. Anal. App. , 41 : 531 – 535 .
- Horvath , J. 1953 . Sur les fonctions conjugees a plusieurs variables . Nederl. Akad. Wetensch. Proc. Ser. , A16 : 17 – 29 .
- Segal , I. E. and Goodman , R. W. 1965 . Antilocality of certain Lorentz-invariant operators . J. Math. Mech. , 14 : 629 – 638 .
- Titchmarsh , E. C. 1939 . “ The Theory of Functions ” . Oxford : Oxford University Press .
- Yosida , K. 1978 . “ Functional Analysis ” . New York : Springer-Verlag .