Advances in Agile and User-Centred Software Engineering: Third International Conference on Lean and Agile Software Development, LASD 2019, and 7th Conference on Multimedia, Interaction, Design and Innovation, MIDI 2019, Leipzig, Germany, September 1–4 - PrzybyÅ‚ek; Morales-Trujillo, Miguel Ehécatl (Springer International Publishing, 2020)