---
res:
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Eckhard
      foaf_name: Steffen, Eckhard
      foaf_surname: Steffen
      foaf_workInfoHomepage: http://www.librecat.org/personId=15548
    orcid: 0000-0002-9808-7401
  - foaf_Person:
      foaf_givenName: Alexander
      foaf_name: Vogel, Alexander
      foaf_surname: Vogel
  bibo_volume: 91
  dct_date: 2021^xs_gYear
  dct_language: eng
  dct_title: Concepts of signed graph coloring@
...