Overseas Visits
1.

November 4 to December 3, 1985, ICTP, Trieste, Italy.
2.

December 4 to December 22, 1985:

(i) University of Vienna, Vienna
(ii) University of Paris, Orsay, France
(iii) Institute Fourier, Grenoble, France
3.

September 15 to October 18, 1996, Rutgers University, New Brunswick,
New Jersey, U.S.A.