Aiko Frank Jürgen Sellentin Bernhard Mitschang TOGA-A Customizable Service for Data-Centric Collaboration. 157-176 2000 25 Inf. Syst. 2 db/journals/is/is25.html#FrankSM00 http://dx.doi.org/10.1016/S0306-4379(00)00014-4