Lapresa, D., Álvarez, I., Anguera Argilaga, M. T., Arana Idiakez, J., & Garzón Echevarría, B. (2015). Comparative analysis of the use of space in 7-a-side and 8-a-side soccer: How to determine the minimum sample size in observational methodology.

Lapresa, Daniel, Ildefonso Álvarez, María Teresa Anguera Argilaga, Javier Arana Idiakez, y Belén Garzón Echevarría. Comparative Analysis of the Use of Space in 7-a-side and 8-a-side Soccer: How to Determine the Minimum Sample Size in Observational Methodology. 2015.

Lapresa, Daniel, et al. Comparative Analysis of the Use of Space in 7-a-side and 8-a-side Soccer: How to Determine the Minimum Sample Size in Observational Methodology. 2015.