@article{article2196,
  title = {When was ventricular septal defect first defined?},
  author = {Ulus, A.T. and Songur, M. and Kahya, E.},
  journal = {The Anatolian Journal of Cardiology},
  year = {2011},
  volume = {11},
  pages = {179-179},
  doi = {10.5152/akd.2011.041}
}