1. 1.Top Trends Now and Next at https://toptrends.nowandnext.com/ https://nowandnext.com/PDF/Mega%20Trends%20and%20Technologies%202017-205...(Web).png?fbclid=IwA R2vtrT2x5OvbMikWGUPkiH1DO_x2CeybxtyEJF-AEZEXIFI4wc5Qqr-S44
2. 2.G. Mensch, G. Haag, W. Weidlich (1982). Econometrica, Vol. 50, 1982, p. 15.
3. Concepts and models of quantitative sociology;Weidlich;The dynamics of interacting populations Springer Verlag Berlin-Heidelberg-New York,1983
4. 4.Hřebíček, J., Pitner, T. (2004). Modeling Social Processes. In: Solving Problems in Scientific Computing За допомогою Maple and MATLAB®. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-18873-2_24
5. 5.W. Weidlich, G. Haag (1980). Dynamic of interacting groups in society, in H. Haken: Dynamics of synergetics systems, Springer Verlag Berlin-Heidelberg-New York, 1980.