@misc{indiciae42f303cbf21e,
  title = {Test for planetary influences on solar activity},
  author = {Dingle, L. A. and Van Hoven, G. and Sturrock, P. A.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19740028070},
  note = {Source identifier: 19740028070}
}