@inproceedings{kurniawati_meidasari_miftah_2018, 
  title={Using Problem-Based Learning Approach with Scaffolding Technique to Enhance Studentsr Mathematical-logical Thinking Ability}, 
  DOI={10.2991/icems-17.2018.21}, 
  publisher={Atlantis Press}, 
  author={Kurniawati and Meidasari and Miftah}, 
  year={2018}
  }