@article{shrock_2013, 
  title={Higher-loop structural properties of theβfunction in asymptotically free vectorial gauge theories}, 
  volume={87}, 
  DOI={10.1103/physrevd.87.105005}, 
  number={10}, 
  publisher={American Physical Society (APS)}, 
  author={Shrock}, 
  year={2013}, 
  month={May}
  }