COMPUTATIONAL GEOMETRY-THEORY AND APPLICATIONS, vol. 26, no. 2, page. 129 - 141, 2003-10
LECTURE NOTES ON COMPUER SCIENCE, vol. 2518, page. 274 - 285, 2002-01
THEORETICAL COMPUTER SCIENCE, vol. 310, no. 1-3, page. 457 - 467, 2004-01-01