Uniformly Defining Complexity Classes of Functions. - Sven Kosub; Heinz Schmitz; Heribert Vollmer (STACS, 1998)

The Boolean Hierarchy over Level 1/2 of the Straubing-Therien Hierarchy - Heinz Schmitz; Klaus W. Wagner (CoRR, 1998)

Decidable Hierarchies of Starfree Languages. - Christian Glaßer; Heinz Schmitz (FSTTCS, 2000)

Uniform Characterizations of Complexity Classes of Functions. - Sven Kosub; Heinz Schmitz; Heribert Vollmer (Int. J. Found. Comput. Sci., 2000)

Restricted Temporal Logic and Deterministic Languages. - Heinz Schmitz (J. Autom. Lang. Comb., 2000)

The forbidden pattern approach to concatenation hierarchies. - Heinz Schmitz (2000)

Level 5/2 of the Straubing-Thérien Hierarchy for Two-Letter Alphabets. - Christian Glaßer; Heinz Schmitz (Developments in Language Theory, 2001)

The Boolean Structure of Dot-Depth One. - Christian Glaßer; Heinz Schmitz (J. Autom. Lang. Comb., 2001)

Multiobjective Disk Cover Admits a PTAS. - Christian Glaßer; Christian Reitwießner; Heinz Schmitz (ISAAC, 2008)

Languages of Dot-Depth 3/2. - Christian Glaßer; Heinz Schmitz (Theory Comput. Syst., 2008)

Approximability and Hardness in Multi-objective Optimization. - Christian Glaßer; Christian Reitwießner; Heinz Schmitz; Maximilian Witek (CiE, 2010)

Hardness and Approximability in Multi-Objective Optimization. - Christian Glaßer; Christian Reitwießner; Heinz Schmitz; Maximilian Witek (Electron. Colloquium Comput. Complex., 2010)

It's about time: Online Macrotask Sequencing in Expert Crowdsourcing. - Heinz Schmitz; Ioanna Lykourentzou (CoRR, 2016)

A complexity analysis and an algorithmic approach to student sectioning in existing timetables. - Maria Dostert; A. Politz; Heinz Schmitz (J. Sched., 2016)

Efficient algorithms for membership in boolean hierarchies of regular languages. - Christian Glaßer; Heinz Schmitz; Victor L. Selivanov (Theor. Comput. Sci., 2016)

Online Sequencing of Non-Decomposable Macrotasks in Expert Crowdsourcing. - Heinz Schmitz; Ioanna Lykourentzou (ACM Trans. Soc. Comput., 2018)

Decomposition of university course timetabling. - Britta Herres; Heinz Schmitz (Ann. Oper. Res., 2021)

A Hierarchical Integer Linear Programming Approach for Optimizing Team Formation in Education. - Aaron Kessler; Tim Scheiber; Heinz Schmitz; Ioanna Lykourentzou (CoRR, 2025)