A. E. Tekkaya, T. Mennecart, J. Witulski, W. Homberg, and T. Rostek, Presshärten von Rohren und Profilen mittels formlos festen Stoffen. Düsseldorf: Verlag und Vertriebsgesellschaft mbH, 2012.

W. Homberg and T. Rostek, “High Performance Active Elements for Agricultural Machines Made of Ultra High-Strength Steels,”10.4028/www.scientific.net/kem.473.229__Key Engineering Materials, pp. 229–234, 2011, doi:10.4028/www.scientific.net/kem.473.229 .

T. Mennecart, T. Rostek, J. Witulski, A. Brosius, A. E. Takkaya, and W. Homberg, “Presshärten von Rohren und Profilen mittels formlos fester Stoffe.” Meisenbach, Erlangen, 2011.

W. Homberg and T. Rostek, “High Performance Active Elements for Agricultural Machines Made of Ultra High-Strength Steels,” 2011.

W. Homberg, D. Hornjak, C. Beerwald, T. Rostek, J. Kunert, and D. Wilk, Incremental forming of tubes and sheets assisted by friction-induced heating. Auerbach, 2009.