García Obando PA, Aguirre Román JO, Pabón Mantilla AP. Difficult cases as collision between premises. Attempting an explanation from the Perelman argumentation theory. Juríd. [Internet]. 2009 Jan. 1 [cited 2024 Jul. 3];6(1):79-96. Available from: https://revistasojs.ucaldas.edu.co/index.php/juridicas/article/view/5622