A Computational Method for Estimating the Demand of Retail Stores on a Street Network and its Implementation in GIS. - Atsuyuki Okabe; Kei-ichi Okunuki (Trans. GIS, 2001)

Solving the Huff-Based Competitive Location Model on a Network with Link-Based Demand. - Kei-ichi Okunuki; Atsuyuki Okabe (Ann. Oper. Res., 2002)

Sketch Map Analysis Using GIS Buffer Operation. - Kohei Okamoto; Kei-ichi Okunuki; Toshibumi Takai (Spatial Cognition, 2004)

The SANET Toolbox: New Methods for Network Spatial Analysis. - Atsuyuki Okabe; Kei-ichi Okunuki; Shino Shiode (Trans. GIS, 2006)

A comparison of neighbourhood relations based on ordinary Delaunay diagrams and area Delaunay diagrams: an application to define the neighbourhood relations of buildings. - Hiroyuki Usui; Akihiro Teraki; Kei-ichi Okunuki; Toshiaki Satoh (Int. J. Geogr. Inf. Sci., 2020)