. . "dwarf nova" . "SU UMa" . . . "UGSS" . . . "U Gem" . "UGWZ" . "UGSU" . . "UG" . "UG-type stars" . "Dwarf nova" . . "UGZ" . "DN" . . "dwarf novae" . . "Dwarf nova" . "U Geminorum star" . "dwarf-nova" .