Boulton, G. (2001) Palaeohydrogeology and geoforecasting for performance assessment in geosphere repositories for radioactive waste disposal (Pagepa): final report Directorate-General for Research, European Commission, Brussels, Belgium, ISBN 978-92-894-1238-4; abstractنسخة محفوظة 11 مايو 2020 على موقع واي باك مشين.
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Boulton, G. (2001) Palaeohydrogeology and geoforecasting for performance assessment in geosphere repositories for radioactive waste disposal (Pagepa): final report Directorate-General for Research, European Commission, Brussels, Belgium, ISBN 978-92-894-1238-4; abstractنسخة محفوظة 11 مايو 2020 على موقع واي باك مشين.