Research article Refined System Ephemeris for Five Contact Binaries: GW Psc, NS Com, NW Aqr, V0492 Lac, V1355 Tau Atila Poro, Elnaz Bozorgzadeh, Negar Sadat Mahdavi, Ahmad Sarostad, Sobhan Sarmad, Elnaz Abdolrahimi Niari, Masoud Rahimpour Vayani P 1-7 Full Text (PDF) HTML