Conflict analysis as a means of enforcing static separation of duty requirements in workflow environments. - Stephen Perelson; Reinhardt A. Botha (South Afr. Comput. J., 2000)

Separation of Duty administration. - Stephen Perelson; Reinhardt A. Botha; Jan H. P. Eloff (South Afr. Comput. J., 2001)

An Investigation Into Access Control For Mobile Devices. - Stephen Perelson (ISSA, 2004)

A Model for Secure Value-Added Service Subscriptions in Cellular Networks. - Jacobus A. Ophoff; Stephen Perelson; Reinhardt A. Botha (ISSA, 2006)