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}
}