Dworkin, Steven N. 1989. “Studies in lexical loss: the fate of Old Spanish post-adjectival abstracts in -dad, -dumbre, -eza, and -ura,” Bulletin of Hispanic studies, 66 (4): 335–42.
Studies in lexical loss: the fate of Old Spanish post-adjectival abstracts in -dad, -dumbre, -eza, and -ura