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m Open access bot: doi added to citation with #oabot. |
→References: why u no mark these free? |
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<ref name=f>{{citation
| last = Fronček | first = Dalibor
| hdl = 10338.dmlcz/136481 | hdl-access = free
| issue = 1
| journal = Mathematica Slovaca
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| title = Locally linear graphs
| volume = 39
| year = 1989
<ref name=fan>{{citation
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<ref name=z>{{citation
| last = Zelinka | first = Bohdan
| hdl = 10338.dmlcz/133017 | hdl-access = free
| issue = 2
| journal = Mathematica Slovaca
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| title = Polytopic locally linear graphs
| volume = 38
| year = 1988
<ref name=zd>{{citation
|