Astronomical Observatory on Kolonica Saddle and variable stars observations – Senec 2012, talk for local astronomy group
Space observations – on International day of astronomy in Snina 2007 (in Slovak)
Pavol A. Dubovský
Astronomical Observatory on Kolonica Saddle and variable stars observations – Senec 2012, talk for local astronomy group
Space observations – on International day of astronomy in Snina 2007 (in Slovak)