Visser, E. (2020). A grammar of Kalamang: The Papuan language of the Karas Islands. Lund University.

Jorge Emilio Rosés Labrada & Francia Medina (2019). Sapé (Venezuela) — Language Snapshot. In Peter K. Austin (ed.) Language Documentation and Description, vol 16. London: EL Publishing. pp. 169-175. http://www.elpublishing.org/PID/172

Chiatoh, Blasius Agha-ah. (2020). Urbanization and the Fate of Indigenous Urban Minority Languages in Cameroon. In Mba, Gabriel, Tabe, Florence & Neba, Ayu’nwi N. (Eds.) Aspects of the phonology, morphology and syntax of Cameroonian languages: (Wandala, Kwandja, Bassa, Limbum, Ghomala’, Kejom, Obang, Baba, West Ring) and applied linguistics: essays in honour of Pius Ngwa Tamanji . LINCOM GmbH.

Hara, Kiyoshi & Heinrich, Patrick. (2015). Linguistic and cultural revitalization. In Heinrich, Patrick, Miyara, Shinsho, & Shimoji, Michinori. (Eds.), Handbook of the Ryukyuan languages : history, structure, and use (649-665). De Gruyter Mouton. https://doi.org/10.1515/9781614511151

Gonzalez, Ivette S. 2020. Paipai (Baja California, Mexico) – Language Snapshot. In Peter K. Austin (ed.) Language Documentation and Description 17, 150-157. London: EL Publishing. http://www.elpublishing.org/PID/191

Kejonen, Olle. 2020. North Saami, Čohkkiras variety (Sweden, Norway) – Language Snapshot. In Peter K. Austin (ed.) Language Documentation and Description 17, 178-185. London: EL Publishing. http://www.elpublishing.org/PID/194

Dayley, Jon P., Mberwa, Mwaliko, and Martinez, Michal Temkin (eds.). 2020. "Chizigula of Somalia - English Dictionary." Webonary.org. SIL International. Retrieved October 12 2021, from https://www.webonary.org/somali-chizigula/.

Van der Lubbe, Gijs & Akiko Tokunaga. (2015). Okinoerabu Grammar. In Heinrich, Patrick, Miyara, Shinsho, & Shimoji, Michinori (Eds.), Handbook of the Ryukyuan languages : history, structure, and use (345-377) . De Gruyter Mouton. https://doi.org/10.1515/9781614511151

Shinsho, Miyara. (2015). Phonological aspects of Ryukyuan languages. In Heinrich, Patrick, Miyara, Shinsho, & Shimoji, Michinori. (Eds.), Handbook of the Ryukyuan languages : history, structure, and use (175-198) . De Gruyter Mouton. https://doi.org/10.1515/9781614511151

Pellard, Thomas. (2015). The Linguistic archeology of the Ryukyu Islands. In Heinrich, Patrick, Miyara, Shinsho, & Shimoji, Michinori. (Eds.), Handbook of the Ryukyuan languages : history, structure, and use (13-37) . De Gruyter Mouton. https://doi.org/10.1515/9781614511151