Much of the comparative research for Hounkpati B.C. Capo's influential classification of the Gbe languages was carried out in the seventies, and partial results trickled down in the late seventies and early eighties in the form of articles on specific phonological developments in various branches of Gbe. In his 1988 work "Renaissance du Gbe", the internal classification of Gbe was published in full for the first time (part of the introduction in his 1991 "A Comparative Phonology of Gbe" is an English translation of this). In this classification, Phla–Pherá is considered one of the five branches of Gbe, the others being Ewe, Gen, Fon, and Ajá. According to Capo (1988:15), the Phla–Pherá group consists of the following lects: