Effort Estimation Using Analogy. - Martin J. Shepperd; Chris Schofield; Barbara A. Kitchenham (ICSE, 1996)

Estimating Software Project Effort Using Analogies. - Martin J. Shepperd; Chris Schofield (IEEE Trans. Software Eng., 1997)

An investigation of machine learning based prediction systems. - Carolyn Mair; Gada F. Kadoda; Martin Lefley; Keith Phalp; Chris Schofield; Martin J. Shepperd; Steve Webster (J. Syst. Softw., 2000)