@article{shimizu_1992, 
  title={Taxonomy and Phytogeography of the Conifers,with Special Reference to Some Subalpine Genera (2) The Genus Picea}, 
  volume={09}, 
  DOI={10.34596/hisbot.09.0_3}, 
  number={0}, 
  publisher={Japanese Association of Historical Botany}, 
  author={Shimizu, Tatemi}, 
  year={1992}
  }