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Introduction to PERT
Evarts, Harry F., (1964)
Proposal of a new distribution in PERT methodology
García, Catalina Beatriz García, (2010)
Revisiting the PERT mean and variance
Herrerı´as-Velasco, José Manuel, (2011)
The ABCs of the critical path method
Levy, Ferdinand K., (1963)
The ABCs of the Critical Path Method
Levy, Ferdinand K., (1966)
Time preference, firm growth, and programming models
Levy, Ferdinand K., (1979)