@article{mendoza_pazos_gonzález_2016, 
  title={New perspectives on contributing factors to the monthly behavior of the aa geomagnetic index}, 
  volume={68}, 
  DOI={10.1186/s40623-016-0569-z}, 
  publisher={Springer Nature}, 
  author={Mendoza and Pazos and González}, 
  year={2016}
  }