Weidenthaler, C.; Schmidt, W. Thermal Stability and Thermal Transformations of Co²⁺- or Ni²⁺ -Exchanged Zeolites A, X, and Y. Chemistry of Materials 2000, 12, 3811–3820.

Kestenbaum, H.; Lange de Oliveira, A.; Schmidt, W.; Schüth, F.; Ehrfeld, W.; Gebauer, K.; Löwe, H. Synthesis of Ethylene Oxide in a Catalytic Microreactor System. Studies in Surface Science and Catalysis 2000, 130, 2741–2746.

Schmidt, W.; Schüth, F.; Kallus, S. The Thermal Stability of the Gallophosphate Cloverite. Studies in Surface Science and Catalysis 1997, 105, 771–778.

Althoff, R.; Reitmaier, S.; Schmidt, W.; Zibrowius, B.; Unger, K. K.; Schüth, F. The Synthesis of Zeolites from Dry Powders. Studies in Surface Science and Catalysis 1995, 98, 36–37.

Reichert, H.; Schmidt, W.; Grillet, Y.; Llewellyn , P.; Rouquerol , J.; Unger. Investigation on the Adsorption of N₂ Ar, CO and CH₄ on Aluminophosphates. Studies in Surface Science and Catalysis 1994, 87, 517–524.

Zibrowius, B.; Anderson, M. W.; Schmidt, W.; Schüth, F.; Aliev, A. E.; Harris, K. D. M. Aspects of the Characterization of Cloverite by Solid-State N.m.r. Techniques. Zeolites 1993, 13, 607–610.

Gügel, A.; Müllen, K.; Reichert, H.; Schmidt, W.; Schön, G.; Schüth, F.; Spiekermann, J.; Titman, J.; Unger, K. The Incorporation of C₆₀ in Molecular Sieves. Angewandte Chemie International Edition 1993, 32, 556–557.

Schmidt, W.; Schüth, F.; Reichert, H.; Unger, K.; Zibrowius, B. VPI-5 and Related Aluminophosphates: Preparation and Thermal Stability. Zeolites 1992, 12, 2–8.

Spichtinger, R.; Kanz-Reuschel, B.; Wallau, M.; Schüth, F.; Schmidt, W.; Unger, K. K. Zeolithe, Maßgeschneiderte Synthetische Molekularsiebe für Neue Anwendungen in Chemie. Universität Mainz: Forschungsmagazin 1991, 2, 42–46.

Schmidt, W.; Schüth, F.; Weidenthaler, C. Diffraction and Spectroscopy of Porous Solids. In Comprehensive Inorganic Chemistry II (Second Edition). From Elements to Applications; Volume 5: Porous Materials and Nanomaterials; Reedijk, J., Poeppelmeier, K., Series Eds.; Elsevier: Amsterdam, 2013; Vol. Volume 5, pp 1–24.

Schmidt, W. Synthetic Inorganic Ion Exchange. In Ion Exchange Technology I; Inamuddin, Luqman, M., Series Eds.; Springer, 2012; Vol. 1, pp 277–298.

Schmidt, W. Titanium-Based Nanoporous Materials. In Ordered Porous Solids; Valtchev, V., Mintova, S., Tsapatsis, M., Series Eds.; Elsevier: Amsterdam, 2009; pp 51–75.

Rumplecker, A.; Zibrowius, B.; Schmidt, W.; Yang, C.-M.; Schüth, F. Evolution of Mesoporosity and Microporosity of SBA-15 during a Treatment with Sulfuric Acid. In Recent Progress in Mesostructured Materials; Zhao, D., Qiu, S., Tang, Y., Yu, C., Series Eds.; Studies in Surface Science and Catalysis; Elsevier: Amsterdam, 2007; pp 195–198.

Schmidt, W. Microporous and Mesoporous Catalysts. In Surface and Nanomolecular Catalysis; Richards, R., Series ed.; CRC/Taylor & Francis: Boca Raton, 2006; pp 95–139.

Palkovits, R.; Ilhan, Y.; Schmidt, W.; Yang, C.-M.; Erdem-Sentalar, A.; Schüth, F. Beckmann Rearrangement on Microporous and Mesoporous Silica. In Molecular Sieves: From Basic Research to Industrial Applications, Studies in Surface Science and Catalalysis; Cejka, J., Series ed.; Studies in Surface Science and Catalysis; Elsevier: Amsterdam, 2005; Vol. 158, pp 1255–1262.

Schmidt, W. Synthetische Silicate. In Chemische Technology (Winnacker-Küchler); Dittmeyer, R., Keim, W., Kreysa, G., Oberholz, A., Series Eds.; Chemische Technology (Winnacker-Küchler); Wiley-VCH: Weinheim, 2005; pp 849–850.

Schmidt, W. Synthetische Zeolithe. In Chemische Technology (Winnacker-Küchler); Dittmeyer, R., Keim, W., Kreysa, G., Oberholz, A., Series Eds.; Chemische Technology (Winnacker-Küchler); Wiley-VCH: Weinheim, 2005; pp 834–849.

Ågren, P.; Thomson, S.; Ilhan, Y.; Zibrowius, B.; Schmidt, W.; Schüth, F. Chemical Linking of MFI-Type Colloidal Zeolite Crystals. In Impact of Zeolites and other Porous Materials on the New Technologies at the Beginning of the New Millenium, Studies in Surface Science and Catalysis; Aiello, R., Testa, F., Giordano, G., Series Eds.; Elsevier: amsterdam, 2002; pp 159–166.

Schmidt, W. Positron Annihilation Spectroscopy. In Handbook of Porous Solids; Schüth, F., Sing, K. S. W., Weitkamp, J., Series Eds.; Wiley-VCH: Weinheim, 2002; Vol. 1, pp 506–532.

Schmidt, W. Application of Microporous Materials as Ion-Exchangers. In Handbook of Porous Solids; Schüth, F., Sing, K. S. W., Weitkamp, J., Series Eds.; Wiley-VCH: Weinheim, 2002; Vol. 2, pp 1058–1097.