1.
Ramírez Álvarez A, Terrazas Santamaría D. Temporal evolution of the technological impact of Mexican patents: An application of the expectation-maximization algorithm. EE [Internet]. 1Jan.2020 [cited 10Jul.2020];35(1):37-9. Available from: https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/397