mit O. Schaudt:
On Bounding the Difference of the Maximum Degree and the Clique Number
Graphs and Combinatorics 31 (5), pp. 1689-1702 (2015).

On cliques, colorings, and the maximum degree in graphs
Dissertation, University of Cologne (2015).

mit O. Schaudt und R. Schrader:
On the separability of graphs
Discrete Mathematics 313 (6), pp. 809-820 (2013).

A note on Reed's Conjecture about ω, Δ and χ with respect to vertices of high degree
eingereicht bei Discrete Mathematics (2016).