Quantitative Early-Phase User Research Methods: Hard Data for Initial Product Design. - Christopher N. Chapman; Edwin Love; James L. Alford (HICSS, 2008)

Product interest and engagement scale, beta (pies-beta): initial development. - Christopher N. Chapman; Michal Lahav; Edwin Love; James L. Alford (CHI Extended Abstracts, 2009)

A genetic algorithm system for product line exploration and optimization. - Christopher N. Chapman; James L. Alford (NaBIC, 2010)