@article{witham2011developing,
  author = "S. Witham and K. Talley and L. Wang and Z. Zhang and S. Sarkar and D. Gao and W. Yang and E. Alexov",
  title = "Developing hybrid approaches to predict pKa values of ionizable groups",
  year = 2011,
  journal = "Proteins: Structure, Function, and Bioinformatics",
  publisher = "Wiley Subscription Services, Inc., A Wiley Company Hoboken",
  volume = 79,
  number = 12,
  pages = "3389-3399"
}