1. BigLever Software “BigLever Software Gears ”http://www.biglever.com/solution/product.html accessed October 28 2020
2. Clements P. “What is Product Line Engineering (PLE)?” Aerospace Manufacturing and Design August 9 2017. Available at:https://www.aerospacemanufacturinganddesign.com/article/what-is-product-line-engineering-ple/. Accessed October 27 2020.
3. INCOSE International Working Group for Product Line Engineering “Feature-based Systems and Software Product Line Engineering: A Primer.” 2019. Available athttps://connect.incose.org/Pages/Product-Details.aspx?ProductCode=PLE_Primer_2019 accessed November 3 2019.
4. YoungB. Clements P. “Model Based Engineering and Product Line Engineering: Combining Two Powerful Approaches at Raytheon ” INCOSE International Symposium2017 Adelaide.
5. WillRoper “There is No Spoon: The New Digital Acquisition Reality” 18 Sept2020