Pouzarová, Iveta - In: Acta Universitatis Bohemiae Meridionales 3 (2000) 1, pp. 31-37
Activities including ,,services” had a long development from the old tribes. A big difference in services came into being in the time of serfdom in the ancient Greece and Rome. The Dutch T. POPMA already in 17th century described 146 different names for the performances of these unfree workers...