Natyashastra
प्रस्तारो माषघातः स्यादुपर्वतनमेव च । उपघातः प्रवेणी च चतुरश्रं सुशीर्षकम् ॥ ५॥
Prastāra, Māṣaghāta, Upavartana, Upaghāta, Praveṇī, Caturasra, and Śīrṣaka—these too are (included as) parts of the Dhruvā songs.
english translation
prastAro mASaghAtaH syAduparvatanameva ca । upaghAtaH praveNI ca caturazraM suzIrSakam ॥ 5॥
hk transliteration by Sanscript