2009 жылы. Athens, Greece, Sept. 25, 2009 Free and Open Source Conference SanktAugustin, Germany, August 23, 2008 XV Semana Informática of the Instituto Superior
Marcovich, Miroslav (2001). Heraclitus. Greek Text with a Short Commentary. SanktAugustin: Academia Verlag. ISBN 3-89665-171-4. First edition: Heraclitus, editio