Donaldson, D. M.; Robertson, J. M. (1953). "The crystal and molecular structure of ovalene a quantitative X-ray investigation". Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 220 (1141): 157–170. Bibcode:1953RSPSA.220..157D. doi:10.1098/rspa.1953.0179. S2CID98584903.
Donaldson, D. M.; Robertson, J. M. (1953). "The crystal and molecular structure of ovalene a quantitative X-ray investigation". Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 220 (1141): 157–170. Bibcode:1953RSPSA.220..157D. doi:10.1098/rspa.1953.0179. S2CID98584903.
Donaldson, D. M.; Robertson, J. M. (1953). "The crystal and molecular structure of ovalene a quantitative X-ray investigation". Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 220 (1141): 157–170. Bibcode:1953RSPSA.220..157D. doi:10.1098/rspa.1953.0179. S2CID98584903.