Antimatter and photon rockets

Cassenti, Antimatter Propulsion for OTV Applications; AIAA Journal of Propulsion, Vol. 1 No. 2, March 1985

Forward, Antiproton Annihilation Propulsion; AIAA Journal of Propulsion, Vol. 1 No. 5, November 1985

Vulpetti and Pecchioli, Considerations about the Specific Impulse of an Antimatter-based Thermal Engine; AIAA Journal of Propulsion, Vol. 5 No. 5, September 1989

Cassenti, Conceptual Designs for Antiproton Space Propulsion Systems; AIAA Journal of Propulsion, Vol. 7 No. 3, May 1991