FPS Extensions Modelling ESGs. - John R. Rankin; Sandra Sampayo Vargas (ACHI, 2009)

Testing Metaphorical Educational FPS Games. - John R. Rankin; Sandra Sampayo Vargas; Paul F. Taylor (Int. J. Comput. Games Technol., 2009)

The effectiveness of adaptive difficulty adjustments on students' motivation and learning in an educational computer game. - Sandra Sampayo Vargas; Chris J. Cope; Zhen He 002; Graeme J. Byrne (Comput. Educ., 2013)