García Romero D, Martínez P, Calvo B, Medrano N. Hertz-Resolution Analog Quadrature Sine Oscillator. Application to Portable Lock-In Amplifiers. Jorn. jovenes investig. I3A [Internet]. 2023 Feb. 14 [cited 2024 May 19];3:52-3. Available from: https://papiro.unizar.es/ojs/index.php/jji3a/article/view/1641