@MASTERSTHESIS{Reznichenko2005diplom, author = {Yevgen Reznichenko}, title = {Secure collaboration in cross-organisational workflows}, school = {Universität Hamburg, Fachbereich Informatik}, year = {2005}, type = {Diplomarbeit}, address = {Vogt-Kölln-Str. 30, 22527 Hamburg, Germany}, month = {7} }