.International Institute of Welding, Annual Assembly, 1979：Practical applications of fracture mechanics to the prevention of failure of welded structures：report, colloquium, Bratislava, 1979.s. n.],1979?.
International Institute of Welding, Annual Assembly, 1979：Practical applications of fracture mechanics to the prevention of failure of welded structures：report, colloquium, Bratislava, 1979
Radio Technical Commission for Aeronautics.Simulation, simulators and software the impact of digital systems(1981 : Washington, DC)：Proceedings of the 1981 Technical Symposium and Annual Assembly Meeting.RTCA,1981.
Simulation, simulators and software the impact of digital systems(1981 : Washington, DC)：Proceedings of the 1981 Technical Symposium and Annual Assembly Meeting
Radio Technical Commission for Aeronautics.RTCA,1981.
