Electrochemical Determination of Norepinephrine by Means of Modified Glassy Carbon Electrodes with Carbon Nanotubes and Magnetic Nanoparticles of Cobalt Ferrite - Queiroz, Daniely Ferreira de; Dadamos, Tony Rogério de Lima; Machado, Sergio Antonio Spinola; Martines, Marco Antonio Utrera; Machado, Sergio Antonio Spinola (Sensors, 2018)