References

RRS, 5, 98.0
  nāyaḥ pacetpañcapalād arvāg ūrdhvaṃ trayodaśāt //Context
RSK, 2, 34.1
  muṇḍaṃ tīkṣṇaṃ tathā kāntaṃ bhedāstasya trayodaśāḥ /Context