References

RKDh, 1, 1, 54.1
  etadvidyādharaṃ yantraṃ hiṅgulākṛṣṭihetave /Context
RKDh, 1, 1, 59.3
  atha dhātūpadhāturasoparasasattvatailādipātanārthaṃ yantrāṇyucyante siddhasāraṃ garbhasāraṃ paramānandamūrtijam /Context