:  Christensen D S
:  The estimate at complete problem: a review of three studies
:  
:  1993
:  
:  International Journal of Project Management
() :  1
:  24
:  Christensen D.S. The estimate at complete problem: a review of three studies // International Journal of Project Management. 1993. Vol. 24. N 1. P. 37 42.
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