PENN, Alan Penn. Obituary: Exploring the frontiers of space: Bill Hillier (1937–2019). Urban Morphology, [S. l.], v. 24, n. 2, p. 224–229, 2022. DOI: 10.51347/jum.v24i2.4098. Disponível em: https://journal.urbanform.org/index.php/jum/article/view/4098. Acesso em: 22 apr. 2026.