DISCRETE APPLIED MATHEMATICS, vol. 159, no. 18, page. 2205 - 2213, 2011-12-06
GEOINFORMATICA, vol. 15, no. 4, page. 665 - 697, 2011-10
INTERNATIONAL JOURNAL OF COMPUTATIONAL GEOMETRY & APPLICATIONS, vol. 21, no. 3, page. 313 - 330, 2011-06
COMPUTATIONAL GEOMETRY-THEORY AND APPLICATIONS, vol. 44, no. 3, page. 178 - 190, 2011-04
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, vol. E94D, no. 2, page. 182 - 189, 2011-02