Relevant references in the development of the X-JToBI model:
2006 Igarashi, Yosuke, Hideaki Kikuchi and Kikuo Maekawa. 2006. Inritsu joohoo [Prosodic information]. In Nihongo hanashi kotoba koopasu no koochikuhoo [Construction of The Corpus of Spontaneous Japanese (CSJ)], Kokuritsu Kokugo Kenkyuujo [National Institute for Japanese Language (NIJL, formerly NRLI)] Report 124, pp. 347-453.
2003 Maekawa, Kikuo. 2003. Corpus of Spontaneous Japanese: Its design and evaluation. In Proceedings of the ISCA and IEEE Workshop on Spontaneous Speech Processing and Recognition (SSPR2003), pp. 7-12. Tokyo, Japan.
1988 Pierrehumbert, Janet B. and Mary E. Beckman. 1988. Japanese Tone Structure. MIT Press.
1986 Beckman, Mary E. and Janet B. Pierrehumbert. 1986. Intonational structure in Japanese and English. Phonology Yearbook 3: 255-309.