Shorter Scientific Visits and Appointments:

• Institute for Nuclear Research, Warsaw, Poland, 1963
• Visiting Scientist at Institut de Physique Nucleaire, Orsay, France, Jan.-Febr. 1968.
• Attending the lecture course "Computation as a language in Physics", ICTP, Trieste, Italy, June-July, 1972.
• Visiting scientist at A. F. Ioffe Physical and Technical Institute of the Academy of Science of the USSR, Leningrad, USSR, December 1973, May 1976, and May 1978.
• Participation by invitation in the CECAM-LURE workshop "The inner-shell excitations in atoms, molecules and solids", Orsay, France, May-June 1978.
• Research Visiting Scholar in the Department of Physics, University of Notre Dame, IN, USA, Febr.-Mar. 1981.
• Visiting Professor, Department of Physics, Indian Institute of Technology - Madras, Chennai, India, Jan.-Mar. 2008, Jan.-Mar. 2009, and Jan.-Mar. 2010.
• Visiting Professor, School of Basic Sciences, Indian Institute of Technology - Mandi, Mandi, Himachal Pradesh, India, Jan.-Apr. 2011.