1. Upcrossing rate solution for load combinations;Larrabee;J. Struct. Div. ASCE,1979
2. Load Models and Load Combinations;Madsen,1979
3. On Stochastic Load Combination;Bosshard,1979
4. Upcrossing Rates for Rectangular Pulse Load Processes;Breitung,1979
5. Probabilistic modelling of man-made load processes and their individual and combined effects;Ditlevsen,1981