The Workload Curve: Subjective Mental Workload. - Steven Estes (Hum. Factors, 2015)

Digital Copilot: Cognitive Assistance for Pilots. - Steven Estes; Kevin Burns; John Helleberg; Kevin Long; Jeffrey Stein; Matthew Pollack (AAAI Fall Symposia, 2016)

Evaluating the Operational Safety of a Digital Copilot. - Kevin Burns; Craig Bonaceto; Steven Estes; John Helleberg (AAAI Fall Symposia, 2017)

Quantifying the Safety Benefits of a Digital Copilot in General Aviation. - Kevin Burns; Craig Bonaceto; Steven Estes; John R. Helleburg (J. Aerosp. Inf. Syst., 2019)