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Schmidt, Philipp A.; Schweier, Markus; Zaeh, Micheal F. . (2012). [Laser Institute of America ICALEO® 2012: 31st International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing - Anaheim, California, USA (September 23–27, 2012)] International Congress on Applications of Lasers & Electro-Optics - Joining of lithium-ion batteries using laser beam welding: Electrical losses of welded aluminum and copper joints. , (), 915–923. doi:10.2351/1.5062563 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research