↑ Lewis, Gilbert N. (1924). “The Magnetism of Oxygen and the Molecule O4”. Journal of the American Chemical Society. 46 (9): 2027–2032. doi:10.1021/ja01674a008.
↑ Oda, Tatsuki; Alfredo Pasquarello (2004). “Noncollinear magnetism in liquid oxygen: A first-principles molecular dynamics study”. Physical Review B. 70 (134402): 1–19. Bibcode:2004PhRvB..70m4402O. doi:10.1103/PhysRevB.70.134402.
↑ Gorelli, Federico A.; Lorenzo Ulivi; Mario Santoro; Roberto Bini (1999). “The ε Phase of Solid Oxygen: Evidence of an O4 Molecule Lattice”. Physical Review Letters. 83 (20): 4093–4096. Bibcode:1999PhRvL..83.4093G. doi:10.1103/PhysRevLett.83.4093.
↑ Lars F. Lundegaard, Gunnar Weck, Malcolm I. McMahon, Serge Desgreniers and Paul Loubeyre (2006). “Observation of an O8 molecular lattice in the phase of solid oxygen”. Nature. 443 (7108): 201–204. Bibcode:2006Natur.443..201L. doi:10.1038/nature05174. PMID16971946.Quản lý CS1: nhiều tên: danh sách tác giả (liên kết)
↑ Friess, U. and Monks, P. S. and Remedios, J. J. and Wagner, T. and Platt, U. (2005). “MAX-DOAS O4 measurements: A new technique to derive information on atmospheric aerosols - Retrieval of aerosol properties”. Journal of Geophysical Research. Bibcode:2004JGRD..10922205W. doi:10.1029/2004jd004904.Quản lý CS1: nhiều tên: danh sách tác giả (liên kết)
