Bott, S., BOTT, S., COLEMAN, A., & ATWOOD, J. (1986). Inclusion of both cation and neutral molecule by a calixarene. Structure of the [p-tert-butylmethoxycalix[4]arene-sodium-toluene]+ cation. Journal of the American Chemical Society, 108(7), pp. 1709-1710. doi:10.1021/ja00267a062

Bott, Simon, SG BOTT, AW COLEMAN, and JL ATWOOD. "Inclusion of Both Cation and Neutral Molecule By a Calixarene. Structure of the [p-tert-butylmethoxycalix[4]arene-sodium-toluene]+ Cation." Journal of the American Chemical Society 108, no. 7 (1986): 1709-1710.

Bott, Simon, SG BOTT, AW COLEMAN, and JL ATWOOD. "Inclusion of Both Cation and Neutral Molecule By a Calixarene. Structure of the [p-tert-butylmethoxycalix[4]arene-sodium-toluene]+ Cation." Journal of the American Chemical Society 108.7 (1986): 1709-1710.