What You See Is What You Test: A Methodology for Testing Form-Based Visual Programs. - Gregg Rothermel; Lixin Li; Christopher DuPuis; Margaret M. Burnett (ICSE, 1998)

A methodology for testing spreadsheets. - Gregg Rothermel; Margaret M. Burnett; Lixin Li; Christopher DuPuis; Andrei Sheretov (ACM Trans. Softw. Eng. Methodol., 2001)