Hoffman, Robert R., and Paul Ward. "Mentoring: A Leverage Point for Intelligent Systems?"  IEEE Intelligent Systems 30, no. 5 (2015):  78-84.

Hoffman, Robert R., Paul Ward, Paul J. Feltovich, Lia DiBello, Stephen M. Fiore, and Dee H. Andrews. Accelerated Expertise: Training for High Proficiency in a Complex World. Psychology Press, Taylor & Francis, 2014.