Breitmeier, H. <https://pure.iiasa.ac.at/view/iiasa/1167.html>, Levy, M.A. <https://pure.iiasa.ac.at/view/iiasa/1417.html>, Young, O.R. <https://pure.iiasa.ac.at/view/iiasa/2775.html>, & Zuern, M. <https://pure.iiasa.ac.at/view/iiasa/2552.html>  (1996).  The International Regimes Database as a Tool for the Study of International Cooperation.   IIASA Working Paper. IIASA, Laxenburg, Austria: WP-96-160