Research conferences on organised crime at the Bundeskriminalamt in Germany - Töttel, Ursula; Büchler, Heinz; Bulanova-Hristova, Gergana; Flach, Gerhard (Luchterhand, 2011)
Vol. 2 edited by Ursula Töttel, Gergana Bulanova-Hristova, Heinz Büchler
Vol. 3 edited by Ursula Töttel, Gergana Bulanova-Hristova, Gerhard Flach
Vol. 3 mit Verlagsangabe: Wiesbaden : BKA