References

RRS, 5, 4.1
  brahmāṇḍaṃ saṃvṛtaṃ yena rajoguṇabhuvā khalu /Context
RRS, 9, 41.2
  dīptopalaiḥ saṃvṛṇuyād yantraṃ tad bhūdharāhvayam //Context