Jensen, Johannes. creator Sørensen, Bent text S.l.] Wiley-Interscience 1984 1St Edition. monographic 345 p. ; Energy storage 0471086045 (hardcover) 9780471086048 (hardcover) http://www.amazon.com/exec/obidos/ASIN/0471086045/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/0471086045/chopaconline-20