@article{abdalla_abdeljawad_2018, 
  title={On the oscillation of Hadamard fractional differential equations}, 
  volume={2018}, 
  DOI={10.1186/s13662-018-1870-x}, 
  publisher={Springer Nature}, 
  author={Abdalla and Abdeljawad}, 
  year={2018}, 
  month={Nov}
  }