Experience with the Implementation of a Concurrent Graph Reduction System on an nCube/2 Platform. - Torsten Bülck; Achim Held; Werner E. Kluge; Stefan Pantke; Carsten Rathsack; Sven-Bodo Scholz; Raimund Schröder (CONPAR, 1994)

Support for discretionary role based access control in ACL-oriented operating systems. - Christian Friberg; Achim Held (ACM Workshop on Role-Based Access Control, 1997)

Hierarchisierung von Benutzerkennungen zur weiteren Differenzierung der Zugriffskontrolle in UNIX. - Achim Held (1999)