How to Use Game Elements to Enhance Learning: Applications of the Theory of Gamified Learning. - Richard N. Landers; Michael B. Armstrong; Andrew B. Collmus (Serious Games and Edutainment Applications, 2017)

The greatest battle is within ourselves: An experiment on the effects of competition alone on task performance. - Richard N. Landers; Andrew B. Collmus; Hayden Williams (Int. J. Hum. Comput. Stud., 2019)

Defining gameful experience as a psychological state caused by gameplay: Replacing the term 'Gamefulness' with three distinct constructs. - Richard N. Landers; Gustavo Fortes Tondello; Dennis L. Kappen; Andrew B. Collmus; Elisa D. Mekler; Lennart E. Nacke (Int. J. Hum. Comput. Stud., 2019)