E. Zangerle, C. Bauer, und A. Said. Proceedings of the Fifteenth ACM Conference on Recommender Systems, Seite 794-795. New York, NY, USA, ACM, (September 2021)
D. Hepting, P. Prusinkiewicz, und D. Saupe. Fractals in the Fundamental and Applied Sciences: Proceedings of the First IFIP Conference on Fractals in the Fundamental and Applied Sciences, Lisbon, Portugal, 6-8 June, 1990, Seite 183--224. New York, IFIP, North-Holland, (Dezember 1991)
M. Jamalabdollahi, A. Mirzaeinia, und S. Salari. 2012 14th International Conference on Advanced Communication Technology (ICACT), Seite 832-836. (Februar 2012)