ADDE: Application Development for the Distributed Enterprise. - Marcel Franckson; John Hall; Alfred Helmerich; Rafael Cañadas; Martin Dehn (Internet Res., 1998)

Specification and Modelling of Multimedia and Hypermedia Applications in Distributed Systems. - Martin Wirsing; Nora Koch; Gustavo Rossi; Alejandra Garrido 001; Luis Mandel; Alfred Helmerich; Luis Olsina (German-Argentinian Workshop on Information Technology, 1999)