USHIDA, Eiko. Vocabulary/Kanji/Conjugation Exercise for Japanese (VKC/J2.0). CALICO Journal, [S. l.], v. 19, n. 3, p. 673–689, 2013. DOI: 10.1558/cj.32639. Disponível em: https://journal.equinoxpub.com/Calico/article/view/16974.. Acesso em: 14 aug. 2024.