References

ÅK, 1, 26, 242.2
  adhamā kṛtrimaṃ kāṣṭhaṃ khadirāsanasambhavam //Context
ÅK, 2, 1, 184.2
  adhamaṃ taṃ vijānīyācchukatuṇḍaṃ ca madhyamam //Context