1 2 "Justyna Zander-Nowicka, Abel Marrero Pérez, Ina Schieferdecker, Zhen Ru Dai: Test Design Patterns for Embedded Systems, In: 10th International Conference on Quality Engineering in Software Technology, CONQUEST 2007, Potsdam, Germany, September 2007" (PDF). Retrieved 2013-08-08. ↑ Karl J. Åström and Richard M. Murray (2008).