Weak model-dependent page segmentation and skew correction for processing document images. - John F. Cullen; Koichi Ejiri (ICDAR, 1993)

Fast and accurate skew detection algorithm for a text document or a document with straight lines. - Goroh Bessho; Koichi Ejiri; John F. Cullen (Document Recognition, 1994)

Word Frequency Distribution in Japanese Text. - Koichi Ejiri; Niklaus Staeheli; Shiori Ooaku (J. Quant. Linguistics, 1994)