LINKS

https://www.edmodo.com/home
https://quizlet.com/137282102/learn
http://dict.leo.org/ende/index_de.html#/search=ertragen&searchLoc=0&resultOrder=basic&multiwordShowSingle=on
https://en.wikiquote.org/wiki/Friedrich_Nietzsche
http://www.zitate.de/autor/Nietzsche,+Friedrich
https://www.youtube.com/watch?v=aFrDN5eYPOQ
https://3dprint.com/98031/3d-printed-robogami/
https://www.researchgate.net/publication/273167043_Robogami_A_Fully_Integrated_Low-Profile_Robotic_Origami
https://en.wikipedia.org/wiki/Shape-memory_alloy
http://rrl.epfl.ch/page-86158.html
http://actu.epfl.ch/news/a-folding-robot-weighing-4-grams-that-crawls-and-j/
https://www.quora.com/What-is-the-unluckiest-event-in-the-history-of-war
http://tutorial.math.lamar.edu/Classes/CalcIII/Limits.aspx
http://tutorial.math.lamar.edu/Classes/CalcIII/PartialDerivatives.aspx
http://tutorial.math.lamar.edu/Classes/CalcIII/PartialDerivInterp.aspx
http://tutorial.math.lamar.edu/Classes/CalcIII/HighOrderPartialDerivs.aspx
http://tutorial.math.lamar.edu/Classes/CalcIII/Differentials.aspx
http://tutorial.math.lamar.edu/Classes/CalcIII/DirectionalDeriv.aspx
https://www.google.com/search?q=imaginary+derivatives&oq=imaginary+derivatives&aqs=chrome..69i64.5302j0j7&sourceid=chrome&ie=UTF-8
http://math.stackexchange.com/questions/149949/finding-a-derivative-with-imaginary-numbers
https://www.physicsforums.com/threads/derivative-of-an-imaginary-number.12953/
http://jlms.oxfordjournals.org/content/s2-3/2/241.extract