INFORMATION SCIENCES, vol. 180, no. 21, page. 4118 - 4135, 2010-11-01
GEOINFORMATICA, vol. 14, no. 4, page. 425 - 446, 2010-10
WORLD WIDE WEB-INTERNET AND WEB INFORMATION SYSTEMS, vol. 13, no. 3, page. 343 - 371, 2010-09
VLDB JOURNAL, vol. 19, no. 4, page. 503 - 529, 2010-08