An analysis of four stellar rings

Leschinski, Kieran; Paunzen, Ernst; Gütl-Wallner, Anna; Wallner, Stefan; Herdin, Andreas; Rode-Paunzen, Monika; Florian, Jan; Kralofsky, Erwin; Mach, Michael; Maitzen, Hans Michael; Prišegen, Michal; Rockenbauer, Markus

Czech Republic, Austria, Slovakia