References

http://spectrum.ieee.org/tech-talk/robotics/robotics-hardware/fishing-line-makes-superhuman-artificial-muscles

http://www.sciencefriday.com/blogs/03/06/2014/how-to-make-an-artificial-muscle-out-of-fishing-line.html

http://www.wvu.edu/~agexten/hortcult/greenhou/building.htm

http://www.gardenandgreenhouse.net/index.php/past-issues-mainmenu-18/121-2012-garden-greenhouse/july-august-2012/1398-the-basics-of-greenhouse-ventilation