Willis, E. A., Szabo-Reed, A. N., Ptomey, L. T., Honas, J. J., Steger, F. L., Washburn, R. A., & Donnelly, J. E. (2019). Energy Expenditure and Intensity of Group-Based High-Intensity Functional Training: A Brief Report. J Phys Act Health.

Willis, Erik A., Amanda N. Szabo-Reed, Lauren T. Ptomey, Jeffery J. Honas, Felicia L. Steger, Richard A. Washburn, و Joseph E. Donnelly. "Energy Expenditure and Intensity of Group-Based High-Intensity Functional Training: A Brief Report." J Phys Act Health 2019.

Willis, Erik A., et al. "Energy Expenditure and Intensity of Group-Based High-Intensity Functional Training: A Brief Report." J Phys Act Health 2019.