Sagara, Keiko and Palfreyman, Nick ORCID: 0000-0002-9095-4937 (2020) Variation in the numeral system of Japanese Sign Language and Taiwan Sign Language: A comparative sociolinguistics study. Asia-Pacific Language Variation, 6 (1). pp. 119-150. ISSN 2215-1354
Sagara, Keiko (2015) Methods in carrying out language typological research. In: Research methods in sign language studies: a practical guide. Wiley, pp. 173-192. ISBN 978-1-118-27141-4
Sagara, Keiko (2014) The numeral system of Japanese Sign Language from a cross-linguistic perspective. Masters thesis, University of Central lLancashire.