Schwarz, H. J., & Hora, H. (1972). "Proceedings of the second workshop held at Rensselear polytechnic Institute, Hartkord.1971" on Laser interaction and related plasma phenomena. Plenum Press.

Schwarz, Helmut J., and Heinrich Hora. "Proceedings of the Second Workshop Held at Rensselear Polytechnic Institute, Hartkord.1971" on Laser Interaction and Related Plasma Phenomena. New York: Plenum Press, 1972.

Schwarz, Helmut J., and Heinrich Hora. "Proceedings of the Second Workshop Held at Rensselear Polytechnic Institute, Hartkord.1971" on Laser Interaction and Related Plasma Phenomena. Plenum Press, 1972.