Brihat Parashara Hora Shastra
दशाबहुविधास्तासु मुख्या विंशोत्तरी मता । कैश्चिदष्टोत्तरी कैश्चित् कथिता षोडशोत्तरी ॥ ३॥
But the other Dashas, followed in special cases, are Astottari, Shodshottari.
english translation
dazAbahuvidhAstAsu mukhyA viMzottarI matA । kaizcidaSTottarI kaizcit kathitA SoDazottarI ॥ 3॥
hk transliteration by Sanscript