Unit distance graphs
Matchstick Graphs Calculator (MGC) – a software for the construction and calculation of unit distance graphs and matchstick graphs (2016–2019).
The graphs from the articles can be viewed with the MGC, which contains also a constructive proof for each graph. This remarkable software created by Stefan Vogel runs directly in web browsers. The method Stefan Vogel used for the calculations he describes in the article: Beweglichkeit eines Streichholzgraphen bestimmen.
4-regular planar unit triangle graphs without additional triangles (2019), Geombinatorics Volume XXIX, Issue 2, October 2019, Pages 72–77
New minimal (4; n)-regular matchstick graphs (2016), Geombinatorics Volume XXVII, Issue 1, July 2017, Pages 26–44
Ein neuer 4-regulärer Streichholzgraph (2016), Mitteilungen der Deutschen Mathematiker-Vereinigung (DMV), Band 24, Heft 2, Juli 2016, Seiten 74–75