Joop S. Duisterhout and Wolfgang Kirsten
Proceedings of the Twelfth Annual Meeting of the MUMPS Users' Group - Europe, Vienna 1987
MUMPS Users' Group - Europe, Rotterdam (1987)
ISBN 90 72355 01 6
Joop S. Duisterhout and Peter J. Branger
Proceedings of the Seventeenth Annual Meeting of the MUMPS Users' Group - Europe, Vienna 1992
MUMPS Users' Group - Europe, Rotterdam (1992)
ISBN 90 72355 04 0