{Period changes in six contact binaries: WZ And, V803 Aql, DF Hya, PY Lyr, FZ Ori, and AH Tau}

Citation:

{Zasche} P, {Liakos} A, {Niarchos} P, {Wolf} M, {Manimanis} V, {Gazeas} K. {Period changes in six contact binaries: WZ And, V803 Aql, DF Hya, PY Lyr, FZ Ori, and AH Tau}. \na. 2009;14:121-128.