Watch out for extrinsic bugs!: A case study of their impact in just-in-time bug prediction models on the OpenStack Project - Gema Rodríguez Pérez; Meyyappan Nagappan; Gregorio Robles Martínez (Actas De Las Xxvii Jornadas De Ingeniería Del Software Y Bases De Datos (Jisbd 2023), 2023)