Heckelmann, Martin: Kleine Schwester der GmbH, S. 32, 2008

Heckelmann, Martin: Grenzüberschreitender Software-Vertrieb, S. R 91-93, 2007

Heckelmann, Martin: Kommt nun die Unternehmergesellschaft?, S. I, 2007

OTHER

Stegemann, Bert ; Lussky, Thomas ; Schöpke, Andreas ; Čermák, Jan ; Rezek, Bohuslav ; Kočka, Jan ; Schmidt, Manfred : Atomic Force Microscopy for Electrical Characterization of Silicon Quantum Dots for High-Efficiency Solar Cells. In: Proceedings of the 2nd International Workshop on Advanced Atomic Force Microscopy Techniques, S. [1 page], Karlsruhe, 2011

Stegemann, Bert ; Lussky, Thomas ; Schöpke, Andreas ; Čermák, Jan ; Rezek, Bohuslav ; Kočka, Jan ; Schmidt, Manfred : Formation Kinetics and Charge Carrier Transport Of Silicon Quantum Dot Layers. In: Proceedings of the 25th European Photovoltaic Solar Energy Conference / 5th World Conference on Photovoltaic Energy Conversion (WCPEC-5) (Valencia, Spain, 2010), S. 260 - 264, Valencia, Spanien, 2010, ISBN 3-936338-26-4

Stegemann, Bert; Schoepke, Andreas; Sixtensson, Daniel; Gorka, Benjamin; Lussky, Thomas; Schmidt, Manfred: Hydrogen passivation of interfacial gap state defects at UHV prepared ultrathin SiO2 layers on Si(111), Si(110), and Si(100). In: Physica E: Low-dimensional Systems and Nanostructures, S. 1019-1024 , Elsevier B.V., 2009, ISSN 1386-9477

Stegemann, Bert ; Sixtensson, Daniel ; Lußky, Thomas ; Schoepke, Andreas ; Schmidt, Manfred : Si/SiO2 Quantum Well and Quantum Dot Structures: Atomic-Scale Preparation and Characterization with Respect to Photovoltaic Application. In: Proceedings of the 23rd European Photovoltaic Solar Energy Conference (Valencia, Spain, 2008), S. 62-65, Valencia, 2008, ISBN 3-936338-24-8

Pfennig, Anja ; Wolf, Marcus ; Wolthusen, Helmut ; Böllinghaus, Thomas : Effect of heat treatment of injection pipe steels on the reliability of a saline aquifer water CCS-site in the Northern German Basin, S. 5762-5772, Austin, Texas, USA, 2014, ISSN 1876-6102