@misc{indiciae40977a05fbc3,
  title = {[Heart sound recognition algorithm based on mathematical morphology].},
  author = {Xingming Guo and Jian Chen and Shouzhong Xiao},
  year = {2004},
  url = {https://pubmed.ncbi.nlm.nih.gov/15553869/},
  note = {Source identifier: 15553869}
}