@misc{indiciae58777ad3691d,
  title = {On-site calibration method based on stepwise solid-phase microextraction.},
  author = {Guohua Xiong and Yong Chen and Janusz Pawliszyn},
  year = {2003},
  doi = {10.1016/s0021-9673(03)00602-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/12885050/},
  note = {Source identifier: 12885050}
}