Bales, M. E., Johnson, S. B., Keeling, J. W., Carley, K. M., Kunkel, F., & Merrill, J. A. (2011). Evolution of Co-authorship in Public Health Systems and Services Research.

Bales, Michael E., Stephen B. Johnson, Jonathan W. Keeling, Kathleen M. Carley, Frank Kunkel, ja Jacqueline A. Merrill. Evolution of Co-authorship in Public Health Systems and Services Research. 2011.

Bales, Michael E., et al. Evolution of Co-authorship in Public Health Systems and Services Research. 2011.