Dryer, Matthew. 2003. Significant and non-significant implicational universals. Linguistic Typology 7. 108-128.
@article{jacquesestimative-dryer03significant, author = {Dryer, Matthew}, journal = {Linguistic Typology}, pages = {108-128}, title = {Significant and non-significant implicational universals}, volume = {7}, year = {2003} }