1. Cohen J (1988) Statistical power analysis for the behavioral sciences. Lawrence Erlbaum, New Jersey
2. Csete J, Wong Y-H, Vogel D (2004) Mobile devices in and out of the classroom. In: Paper presented at the world conference on educational multimedia, hypermedia and telecommunications
3. Defense USDO (2013) US army ranger handbook. Skyhorse Publishing, Inc., New York
4. Garris R, Ahlers R, Driskell JE (2002) Games, motivation, and learning: a research and practice model. Simul Gaming 33(4):441–467
5. Hagman JD (2000) Basic rifle marksmanship training with the laser marksmanship training system. Retrieved from http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA380109