Referenzen

Kemp, S. „Digital 2021 April Global Statshot Report“, 2021. https://datareportal.com/reports/digital-2021-april-global-statshot.

Lawrence, D. „What Percentage of Your Revenue Should Go Into Marketing?“, 2021. https://rocketagency.com.au/blog/what-percentage-revenue-to-marketing.

Piller, Frank, und Ralf Reichwald. „Open Innovation: Kunden als Partner im Innovationsprozess“. URL http://www.impulse.de/downloads/open_innovation.pdf, 2006.

Stockinger, Günther. „Neuronengeflüster im Endhirn“. Der Spiegel 10 (2011): 112–14.

Von Hippel, Eric, Jeroen De Jong, und Steven Flowers. „Comparing Business and Household Sector Innovation in Consumer Products: Findings from a Representative Study in the UK“. Social Science Research Network, Nr. September (2010): 1–39. http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1683503.

Yung-Ti, Li. „On the Function of Cowries in Shang and Western Zhou China“. Journal of East Asian Archaeology 5 (o. J.): 1–26(26). https://doi.org/doi:10.1163/156852303776172999.