Grapsi_Draw Digital Psychrometric Chart. - Daniela de C. Lopes; Fengmin Li; Evandro de C. Melo; José Helvecio Martins; Luis Manuel N. Gracia; Adriana C. Guimarães (CCTA (1), 2008)

A Novel Low-Cost Instrumentation System for Measuring the Water Content and Apparent Electrical Conductivity of Soils. - Alan Kardek Rêgo Segundo; José Helvecio Martins; Paulo Marcos de Barros Monteiro; Rubens Alves de Oliveira; Gustavo Medeiros Freitas (Sensors, 2015)

Sensor for measuring electrical parameters of soil based on auto-balancing bridge circuit. - Alan Kardek Rêgo Segundo; Érica Silva Pinto; Paulo Marcos de Barros Monteiro; José Helvecio Martins (IEEE SENSORS, 2017)

Reply to Comments: A Novel Low-Cost Instrumentation System for Measuring the Water Content and Apparent Electrical Conductivity of Soils, Sensors, 15, 25546-25563. - Alan Kardek Rêgo Segundo; Marco José da Silva; Gustavo Medeiros Freitas; Paulo Marcos de Barros Monteiro; José Helvecio Martins (Sensors, 2018)