@article{yamane_2015, 
  title={New Definition of Generalized Root Systems}, 
  volume={2015}, 
  DOI={10.34508/repsympo.2015.0_113}, 
  number={0}, 
  publisher={Publication Society of the Proceedings of the Symposium on Representation Theory}, 
  author={Yamane, Hiroyuki}, 
  year={2015}
  }