DC Power

http://www.lowtechmagazine.com/2016/04/slow-electricity-the-return-of-low-voltage-dc-power.html

http://relay.nationalgeographic.com/proxy/distribution/public/amp/news/energy/2012/12/121206-high-voltage-dc-breakthrough

http://www.engineering.pitt.edu/Sub-Sites/Labs/Electric-Power-Systems/_Content/Research/Current/DCAMPS/

http://dcgrid.tue.nl/files/2014-02-11%20-%20Webinar%20Vicor.pdf

https://www.greentechmedia.com/amp/article/ac-or-dc-should-we-switch-our-electric-current

http://www.businesswire.com/news/home/20121002006055/en/EMerge-Alliance-Releases-Version-1.1-Occupied-Space

http://auto.howstuffworks.com/question219.htm

https://ees.lbl.gov/sites/all/files/catalog_of_dc_appliances_and_power_systems_lbnl-5364e.pdf