A Low-Cost IoT-Based System to Monitor the Location of a Whole Herd. - Francisco Maroto-Molina; Jorge Navarro-García; Karen Príncipe-Aguirre; Ignacio Gómez-Maqueda; José-Emilio Guerrero-Ginel; Ana Garrido-Varo; Dolores C. Pérez-Marín (Sensors, 2019)