Ibáñez, B., Librero, J., Bernal-Delgado, E., Peiró, S., López-Valcarcel, B. G., Martínez, N., & Aizpuru, F. (2009). Is there much variation in variation? Revisiting statistics of small area variation in health services research. BioMed Central.

Ibáñez, Berta, Julián Librero, Enrique Bernal-Delgado, Salvador Peiró, Beatriz González López-Valcarcel, Natalia Martínez, and Felipe Aizpuru. Is There Much Variation in Variation? Revisiting Statistics of Small Area Variation in Health Services Research. BioMed Central, 2009.

Ibáñez, Berta, et al. Is There Much Variation in Variation? Revisiting Statistics of Small Area Variation in Health Services Research. BioMed Central, 2009.