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2. Marx, K., Engels, F.: The Communist Manifesto (1848). Wood, M.: The Communist Manifesto After 150 Years, Millennium Publications (2017). ISBN 978-15084756
3. Agile Manifesto (2001).
https://www.agilealliance.org/agile101/the-agile-manifesto/
4. SPI Manifesto (2009).
http://www.iscn.com/Images/SPI_Manifesto_A.1.2.2010.pdf
5. Georgiadou, E., Siakas, K., Estdale, J., Berki, E., Rahanu, H., Ross, M.: A comparison of two Manifestos: agile and SPI. In: Khan, O., Marchbank, P., Georgiadou, E., Linecar, P., Ross, M., Staples, G. (eds.) The BCS Proceedings of Software Quality Management XXVII: International Experiences and Initiatives in IT Quality Management. The Annual International Conference of SQM, Southampton (2019)