DIRECTIVE 1999/93/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 13 December 1999 on a Community framework for electronic signatures Official Journal of the European Communities L13 (2000) of 2000-01-19, pp. 12ff. http://europa.eu.int/eur-lex/en/dat/2000/l_013/l_01320000119en00120020.pdf
