@inproceedings{rantala-et-al-histo-2021,
  author      = {Heikki Rantala and Eero Hyvönen and Esko Ikkala},
  title       = {Creating the HISTO Ontology of Finnish History Events},
  booktitle   = {Data for History 2021: Modelling Time, Places, Agents},
  year        = {2021},
  month       = {May},
  note		  = {abstract}, 
  url		=   {https://d4h2020.sciencesconf.org/data/pages/Rantala_Hyvo_nen_Ikkala_HISTO_Ontology_2.pdf},
  OPTproject  = {https://seco.cs.aalto.fi/projects/histo/ https://seco.cs.aalto.fi/projects/history/} 
}