Blocks of the Direct Product of Tolerance Relations. - Christian Jäkel; Stefan E. Schmidt (ISMIS, 2017)

Cover Problems, Dimensions And The Tensor Product Of Complete Lattices. - Christian Jäkel; Stefan E. Schmidt (CLA, 2018)

Rectangle and Square Coverings of Tolerance Spaces and Their Direct Product. - Christian Jäkel; Stefan E. Schmidt (FCA4AI@IJCAI, 2018)

Optimization Problems on Posets. - Christian Jäkel; Stefan E. Schmidt (CLA, 2020)

Packing Problems, Dimensions and the Tensor Product of Complete Lattices. - Christian Jäkel; Stefan E. Schmidt (ICCS, 2021)

Optimization problems on posets with regard to formal concept analysis. - Christian Jäkel; Stefan E. Schmidt (Int. J. Approx. Reason., 2022)