New formulation of the Gompertz equation to describe the kinetics of untreated tumors

Antonio Rafael Selva Castañeda, Erick Ramírez Torres, Narciso Antonio Villar Goris, Maraelys Morales González, Juan Bory Reyes, Victoriano Gustavo Sierra González, María Schonbek, Juan Ignacio Montijano, Luis Enrique Bergues Cabrales