Teaching Network Security in a Virtual Learning Environment. - Laura Bergström; Kaj Grahn; Krister Karlström; Göran Pulkkis; Peik Åström (J. Inf. Technol. Educ., 2004)

Current Network Security Software. - Göran Pulkkis; Kaj Grahn; Peik Åström (Encyclopedia of Information Science and Technology (I), 2005)