Phaladeepika
एवं ग्रहानां सर्वेषं दशां कुर्यात् पृथक् पृथक् । अष्टवर्गदशामार्गः सर्वेषामुत्तमोत्तमः ॥ ३३॥
Thus should the Dasa periods of each of the several planets be computed seperately. The method of computing the Dasa periods by the Ashtakavarga process is the best of all.
english translation
evaM grahAnAM sarveSaM dazAM kuryAt pRthak pRthak । aSTavargadazAmArgaH sarveSAmuttamottamaH ॥ 33॥
hk transliteration by Sanscript