http://ocd.jasr.sk/showdoc.do?docid=911 2016-03-08 1.0 http://ocd.jasr.sk/showdoc.do?docid=917 2014-12-03 1.0 http://ocd.jasr.sk/showdoc.do?docid=969 2012-02-14 1.0 http://ocd.jasr.sk/showdoc.do?docid=913 2014-12-02 1.0 http://ocd.jasr.sk/showdoc.do?docid=921 2014-12-02 1.0