@article{journal,
author = {Mart{\'i}nez-Abrain, A.},
title = {Why do ecologists aim to get positive results? Once again, negative results are necessary for better knowledge accumulation},
year = {2013},
volume = {36.1},
pages = {33--36},
journal = {Animal Biodiversity and Conservation},
keywords = {Pruebas de potencia, Resultados negativos, Magnitud del efecto, Resultados positivos, Datos observacionales, Contraste de hip{\'o}tesis nulas}
}