Hodgkin, D. C.; Kamper, J.; Lindsey, J.; MacKay, M.; Pickworth, J.; Robertson, J. H.; Shoemaker, C. B.; White, J. G.; Prosen, R. J.; Trueblood, K. N. (1957). "The Structure of Vitamin BFormula I. An Outline of the Crystallographic Investigation of Vitamin BFormula". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 242 (1229): 228. Bibcode:1957RSPSA.242..228H. doi:10.1098/rspa.1957.0174. S2CID93391328.
Hawking, S. W. (1983). "The Cosmological Constant [and Discussion]". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 310 (1512): 303–310. Bibcode:1983RSPTA.310..303H. doi:10.1098/rsta.1983.0092. S2CID122814030.
Hodgkin, D. C.; Kamper, J.; Lindsey, J.; MacKay, M.; Pickworth, J.; Robertson, J. H.; Shoemaker, C. B.; White, J. G.; Prosen, R. J.; Trueblood, K. N. (1957). "The Structure of Vitamin BFormula I. An Outline of the Crystallographic Investigation of Vitamin BFormula". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 242 (1229): 228. Bibcode:1957RSPSA.242..228H. doi:10.1098/rspa.1957.0174. S2CID93391328.
Hawking, S. W. (1983). "The Cosmological Constant [and Discussion]". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 310 (1512): 303–310. Bibcode:1983RSPTA.310..303H. doi:10.1098/rsta.1983.0092. S2CID122814030.
Hodgkin, D. C.; Kamper, J.; Lindsey, J.; MacKay, M.; Pickworth, J.; Robertson, J. H.; Shoemaker, C. B.; White, J. G.; Prosen, R. J.; Trueblood, K. N. (1957). "The Structure of Vitamin BFormula I. An Outline of the Crystallographic Investigation of Vitamin BFormula". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 242 (1229): 228. Bibcode:1957RSPSA.242..228H. doi:10.1098/rspa.1957.0174. S2CID93391328.
Hawking, S. W. (1983). "The Cosmological Constant [and Discussion]". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 310 (1512): 303–310. Bibcode:1983RSPTA.310..303H. doi:10.1098/rsta.1983.0092. S2CID122814030.