National Patent
-José Silva and Hiren Canasinh and Luis RedondoModulador de Impulsos Genérico de Alta Tensão Patent Nº 104081, May 2009, https://pt.espacenet.com/publicationDetails/originalDocument?FT=D&date=20090522&DB=&locale=pt_PT&CC=PT&NR=104081B&KC=B&ND=4, [bibTex]