VALLEN, Sam. Experiencing Progressive Rock by Robert G. H. Burns. Popular Music History, [S. l.], v. 11, n. 3, p. 252–255, 2019. DOI: 10.1558/pomh.39023. Disponível em: https://journal.equinoxpub.com/PMH/article/view/15402.. Acesso em: 14 aug. 2024.