BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Little, Todd tlittle@lgc.com P Principal Schedule Estimation and Uncertainty Surrounding the Cone of Uncertainty. Vol: 23 pp. 48-54 Little, Todd tlittle@lgc.com P Principal Value Creation and Capture: A Model of the Software Development Process Vol: 21 pp. 48-53