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  1. 1
    local holding
    published 1977
    Journal
  2. 2
    online resource
    published 1977
    EZB
    Electronic Journal
  3. 3
  4. 4
    online resource
    Published in Journal of Graph Theory (2021)
    Get additional information online
    E-Article
  5. 5
    online resource
    Published in Journal of Graph Theory (2021)
    Get additional information online
    E-Article
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
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  14. 14
  15. 15
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  17. 17
  18. 18
    online resource
  19. 19
    online resource
  20. 20