John V. Gialelis D. Karadimas P. Chondros Athanasios P. Kalogeras Stavros A. Koubias Dimitrios N. Serpanos Web Services based Collaborative B2B e-commerce in the Oil Industry. 61-67 2008 ISCA PDCCS conf/ISCApdcs/2008 db/conf/ISCApdcs/pdccs2008.html#GialelisKCKKS08