I am interested in oriented matroids in the context of directed graphs and optimization. Unfortunately, I know very little of the topic. Is there a book, article or a resource that serves as a good introduction to oriented matroids, especially in the context of directed graphs? It's a bonus if the resource is suitable for an (under)graduate level course and is preferably even free.
What is a good resource to learn about oriented matroids in the context of digraphs and optimization?
optimization;reference request;discrete mathematics;matroids
These notes written by Winfried Hochstttler for an MAA short course on matroids look like a good, short, introduction. They also contain references to several longer references on oriented matroids. 