1. Ackermann E (2015) Fetch robotics introduces fetch and freight: your warehouse is now automated. IEEE Spectrum. Retrieved from https://spectrum.ieee.org/automaton/robotics/industrial-robots/fetch-robotics-introduces-fetch-and-freight-your-warehouse-is-now-automated
2. Ackermann E (2016) German warehouse robots tackle picking tasks. IEEE Spectrum. Retrieved from https://spectrum.ieee.org/automaton/robotics/industrial-robots/german-warehouse-robots-tackle-picking-tasks
3. BMBF (2018) Projekt IndiLuV. Retrieved from https://www.technik-zum-menschen-bringen.de/projekte/indiluv
4. BMWi (2021, May 4) What is Industrie 4.0? Retrieved from https://www.plattform-i40.de/PI40/Navigation/EN/Industrie40/WhatIsIndustrie40/what-is-industrie40.html
5. Crowe S (2018) GreyOrange raises $140M for warehouse robots. Retrieved from https://www.therobotreport.com/greyorange-raises-140m-series-c-warehouse-robots/