Copala Triqui is one of three Triqui languages -- the others are Chicahuaxtla Triqui and Itunyoso Triqui.

Website of Barbara Hollenbach, from SIL.  (In Mexican publications she is often referred to as Elena Erickson de Hollenbach.)

https://www-01.sil.org/~hollenbachb/.

Hollenbach, Barbara E. 1976. Tense—negation interplay in Copala Trique. International Journal of American Linguistics 42:126–32.

Hollenbach, Barbara. 1984a. The phonology and morphology of tone and laryngeals in Copala Trique. Ph.D. thesis, University of Arizona.

Hollenbach, Barbara E. 1992. A syntactic sketch of Copala Trique. Pages 173–431 in C. Henry Bradley and Barbara E. Hollenbach, editors. Studies in the syntax of Mixtecan languages, Volume 4. (Summer Institute of Linguistics and the University of Texas at Arlington Publications in Linguistics 111.) Dallas: Summer Institute of Linguistics and the University of Texas at Arlington.

Hollenbach, Barbara. 2004. Gramática popular del triqui de Copala. ms. (Posted at https://www.sil.org/~hollenbachb/Posted.htm)

Hollenbach, Barbara. 2005 Vocabulario preliminar de triqui de San Juan Copala, Oaxaca. ms. (Postedat https://www.sil.org/~hollenbachb/Posted.htm)

Work by members of the Albany Triqui Working Group:

Broadwell, George Aaron. 2022. The Emergence of Accusative Case in Copala Triqui." Linguistic Discovery 17: 1-20.

del Campo, E.M., 2004. An Ethnopoetic Approach to a Copala Triqui Myth Narrative.

Rodriguez, Jamilläh S., 2021. The Phonology and Syntax of Grammatical Tone in Copala Triqui. Ph.D. thesis. State University of New York at Albany.

Rodriguez, J. and Bickmore, L., 2022. Cophonologies and upper-lower tone register mapping in Copala Triqui. Linguistic Discovery, 17(2).

Rodriguez, J. and Clemens, L., 2020, May. Tone lowering in nominal compounds of Copala Triqui. In Proceedings of the Annual Meetings on Phonology (Vol. 7).

Zimmerglass, Zena. (2016). Focus Structures in Copala Triqui. Senior honors thesis, University at Albany.