@article{li_2008, 
  title={On Meinardus' examples for the conjugate gradient method}, 
  volume={77}, 
  DOI={10.1090/s0025-5718-07-01922-9}, 
  number={261}, 
  publisher={American Mathematical Society (AMS)}, 
  author={Li}, 
  year={2008}, 
  month={Jan}
  }