Note on an Auction Procedure for a Matching Game in Polynomial Time. - Winfried Hochstättler; Hui Jin 002; Robert Nickel (AAIM, 2006)

Two disjoint negative cycles in a signed graph. - Winfried Hochstättler; Robert Nickel; Britta Peis (Electron. Notes Discret. Math., 2006)

The flow lattice of oriented matroids. - Robert Nickel; Winfried Hochstättler (Contributions Discret. Math., 2007)

Order sequencing in the automobile industry. - Thomas Epping; Winfried Hochstättler; Robert Nickel; Peter Oertel (Intelligente Systeme zur Entscheidungsunterstützung, 2008)

On the chromatic number of an oriented matroid. - Winfried Hochstättler; Robert Nickel (J. Comb. Theory B, 2008)

Joins of oriented matroids. - Winfried Hochstättler; Robert Nickel (Eur. J. Comb., 2011)