References

RRÅ, V.kh., 6, 76.1
  cakrayantramidaṃ proktaṃ sarvaśāstrārthakovidaiḥ /Context
RRÅ, V.kh., 8, 84.1
  vajramūṣāgataṃ ruddhvā cakrayantre dinaṃ pacet /Context