Bott, S., Bott, S., Marchand, A., Bolin, J., Wang, Y., Prasad, A., . . . Carlson, T. (1995). Synthesis and base promoted intramolecular nucleophilic reaction of 8-hydroxy-1,2,3,4-tetrachloro-9,9-dimethoxy-1α,4α,4aα,6,7,8β,8aα-hexahydro-1,4-methanonaphthalene-5(1H)-one. Journal of Chemical Crystallography, 25(10), pp. 641-651. doi:10.1007/BF01665970

Bott, Simon, et al. "Synthesis and Base Promoted Intramolecular Nucleophilic Reaction of 8-hydroxy-1,2,3,4-tetrachloro-9,9-dimethoxy-1α,4α,4aα,6,7,8β,8aα-hexahydro-1,4-methanonaphthalene-5(1H)-one." Journal of Chemical Crystallography 25, no. 10 (1995): 641-651.

Bott, Simon, et al. "Synthesis and Base Promoted Intramolecular Nucleophilic Reaction of 8-hydroxy-1,2,3,4-tetrachloro-9,9-dimethoxy-1α,4α,4aα,6,7,8β,8aα-hexahydro-1,4-methanonaphthalene-5(1H)-one." Journal of Chemical Crystallography 25.10 (1995): 641-651.