I recently read such a paper and want to understand the proof idea of this article. However since it is in German and I have not studied German before, I'd like to ask whether this paper has an English version. Or is there a good translation tool available?
- Schumacher V H. Zur Struktur 1‐planarer Graphen[J]. Mathematische Nachrichten, 1986, 125(1): 291-300. doi:https://doi.org/10.1002/mana.19861250122