Hartono, B., and B. A. Saputra. “Are the Experts Really Experts? A Cognitive Ergonomics Investigation for Project Estimations”. Jurnal Teknik Industri: Jurnal Keilmuan Dan Aplikasi Teknik Industri, vol. 14, no. 2, Dec. 2012, pp. 115-22, doi:10.9744/jti.14.2.115-122.