Warren, G. L., Park, N. D., Maresca, R. D., McKibans, K. I., & Millard-Stafford, M. L. Effect of caffeine ingestion on muscular strength and endurance: A meta-analysis.

Warren, Gordon L., Nicole D. Park, Robert D. Maresca, Kimberly I. McKibans, and Melinda L. Millard-Stafford. Effect of Caffeine Ingestion On Muscular Strength and Endurance: A Meta-analysis.

Warren, Gordon L., et al. Effect of Caffeine Ingestion On Muscular Strength and Endurance: A Meta-analysis.