BW Dra
Kaluzny1986 - Kaluzny1986B (Johnson B)
The U, B & V light curves are from Kaluzny & Rucinski (1982). The radial velocity curves are from Batten & Lu (1986). The solutions are from Kaluzny & Rucinski (1986). They only reported solving their V light curve, but I have included U and B models based on their V solution with the wavelength-dependent parameters adjusted appropriately. This is the only known visual binary which consists of two overcontact binaries, BV and BW Dra.