@article {1057, title = {Preface}, journal = {Organon F}, volume = {19}, number = {1}, year = {2012}, pages = {3-4}, url = {http://www.klemens.sav.sk/fiusav/doc/organon/prilohy/2012/1/3-4.pdf}, author = {Zouhar, Mari{\'a}n} }