Surya Siddhanta
सत्रिभग्रहजक्रान्तिभागघ्नाः क्षेपलिप्तिकाः। विकलाः स्वम् ऋणम् क्रान्तिक्षेपयोर् भिन्नतुल्ययोः॥
Multiply the minutes of latitude by the degrees of declination of the position of the planet increased by three signs : the result, in seconds (vikald), is additive or subtractive, according as declination and latitude are of unlike or like direction.
english translation
satribhagrahajakrAntibhAgaghnAH kSepaliptikAH। vikalAH svam RNam krAntikSepayor bhinnatulyayoH॥
hk transliteration by Sanscript