Integer programming (msc 90C10), Structural characterization of families of graphs (msc 05C75), Matroids, geometric lattices (msc 05B35), Packing and covering (msc 05B40), Combinatorial optimization (msc 90C27)
Attached pfd is a "slightly revised version of the authors thesis"
Combinatorial Optimization and Algorithmics

Gerards, A.M.H. (1990, January). Graphs and polyhedra: binary spaces and cutting planes (slightly revised version of the authors thesis).