HUTH, R., KYSELÝ, J., BOCHNÍČEK, J., HEJDA, P. Solar activity affects the occurrence of synoptic types over Europe. Annales Geophysicae. 2008, 26(7), 1999-2004. ISSN 0992-7689. E-ISSN 1432-0576. Available: http://www.ann-geophys.net/26/1999/2008/