Semidefinite bounds for nonbinary codes based on quadruples. - Bart Litjens; Sven C. Polak; Alexander Schrijver (Des. Codes Cryptogr., 2017)

A Tutte polynomial for non-orientable maps. - Andrew J. Goodall; Bart Litjens; Guus Regts; Lluís Vena (Electron. Notes Discret. Math., 2017)

Semidefinite bounds for mixed binary/ternary codes. - Bart Litjens (Discret. Math., 2018)

On the chromatic number of a subgraph of the Kneser graph. - Bart Litjens; Sven C. Polak; Bart Sevenster; Lluís Vena (Electron. Notes Discret. Math., 2018)

Partition functions and a generalized coloring-flow duality for embedded graphs. - Bart Litjens; Bart Sevenster (J. Graph Theory, 2018)

Sum-perfect graphs. - Bart Litjens; Sven C. Polak; Vaidy Sivaraman (Discret. Appl. Math., 2019)

On dihedral flows in embedded graphs. - Bart Litjens (J. Graph Theory, 2019)

A Tutte polynomial for maps II: The non-orientable case. - Andrew J. Goodall; Bart Litjens; Guus Regts; Lluís Vena (Eur. J. Comb., 2020)

Tutte's dichromate for signed graphs. - Andrew J. Goodall; Bart Litjens; Guus Regts; Lluís Vena (Discret. Appl. Math., 2021)