Algebraic complexity theory. II: Tast matrix multiplication and combinatorics. (Algebraische Komplexitätstheorie. II: Schnelle Matrixmultiplikation und Kombinatorik.) Bürgisser, Peter — 1996 Séminaire Lotharingien de Combinatoire [electronic only]
On the structure of Valiant's complexity class. Bürgisser, Peter — 1999 Discrete Mathematics and Theoretical Computer Science. DMTCS [electronic only]
Algebraic complexity theory. I: An introduction. (Algebraische Komplexitätstheorie. I: Eine Einführung.) Bürgisser, Peter; Clausen, Michael — 1996 Séminaire Lotharingien de Combinatoire [electronic only]