Hammarström, Harald. 2010. Rarities in numeral systems. In Wohlgemuth, Jan and Cysouw, Michael (eds.), Rethinking universals. How rarities affect linguistic theory, 11-60. Berlin: Mouton De Gruyter.
@incollection{jacquesestimative-hammarstrom10numeral,
author = {Hammarström, Harald},
booktitle = {Rethinking universals. How rarities affect linguistic theory},
editor = {Wohlgemuth, Jan and Cysouw, Michael},
pages = {11-60},
publisher = {Berlin: Mouton De Gruyter},
title = {Rarities in numeral systems},
year = {2010}
}