http://bg.wikipedia.org/wiki/Климат

http://www.hailinfo.com/h.php3?name=anticyclon.html

http://www.hailinfo.com/h.php3?name=meteo_elements.html

http://chm.moew.government.bg/pa/dict/index.php?all=1

http://nfp-bg.eionet.eu.int/cds_bg/iaos/iaos22.htm