J. Friedrich, A. Maurer, A. Lechler, and A. Verl. Proceedings of the The International Conference Management of Technology – Step to Sustainable Production (MOTSP 2016), Porec, Croatia, (2016)
P. Morin, K. Siebert, and A. Veeser. Applied and Industrial Matematics in Italy - II, volume 75 of Series on Advances in Mathematics for Applied Sciences, page 468-479. Hackensack, NJ, World Sci. Publ., (2007)