Structure graphs and structure graph grammars. - Andries Barnard; E. M. Ehlers; Johannes H. Hattingh (Inf. Sci., 1993)

Combining context provisions with graph grammar rewriting rules - the three-dimensional case. - Andries Barnard; E. M. Ehlers (South Afr. Comput. J., 2002)

Agents, security and ethics: a framework for analysis. - Elme Smith; Mariki M. Eloff; Lucas M. Venter; Andries Barnard; Laurette Pretorius (South Afr. Comput. J., 2003)

Email and Misinformation: A South African Case Study. - Laurette Pretorius; Andries Barnard (Informing Sci. Int. J. an Emerg. Transdiscipl., 2004)

Design Issues in Ethical Agent Computing. - Laurette Pretorius; Andries Barnard; Elsabé Cloete (SIGCAS Comput. Soc., 2004)

Design and Evaluation Criteria for Layered Architectures. - Aurona Gerber; Andries Barnard; Alta van der Merwe (MSVVEIS, 2006)

A Functional Semantic Web Architecture. - Aurona Gerber; Alta van der Merwe; Andries Barnard (ESWC, 2008)