Participation in Research and Development Project No. 8, part of the National Research and Development Program: “Reassessment with Contemporary Methods of Discovered Oil and Gas Reserves for Carbonate Fields; Their Status and Possible Extraction.” Engagement: Collaboration for Solving Special Tasks with Mathematical Content, as Specified in the Program and Work Plan of the Project. Supported by the National Committee for Science and Technology, Contracting Institution: Faculty of Geology and Mining, Tirana, November 2003 – December 2005. (L. Hanelli)