@article{journal, author = {Mart{\'i}nez-Abrain, A.}, title = {Is the 'n = 30 rule of thumb' of ecological field studies reliable? A call for greater attention to the variability in our data}, year = {2014}, volume = {37.1}, pages = {95--100}, journal = {Animal Biodiversity and Conservation}, keywords = {Tama{\~n}o de la muestra, Varianza, Potencia estad{\'i}stica, Magnitud del efecto, Ecolog{\'i}a de campo, Fiabilidad} }