Bott, S., HAMADA, F., BOTT, S., ORR, G., COLEMAN, A., ZHANG, H., & ATWOOD, J. (1990). Thiocalix[4] arenes. I. Synthesis and structure of ethylthiocalix[4]arene methyl ether and the related structure of bromocalix[4]arene methyl ether. Journal of Inclusion Phenomena and Molecular Recognition in Chemistry, 9(3), pp. 195-206. doi:10.1007/BF01053117

Bott, Simon, F. HAMADA, SG BOTT, GW ORR, AW COLEMAN, HM ZHANG, and JL ATWOOD. "Thiocalix[4] Arenes. I. Synthesis and Structure of Ethylthiocalix[4]arene Methyl Ether and the Related Structure of Bromocalix[4]arene Methyl Ether." Journal of Inclusion Phenomena and Molecular Recognition in Chemistry 9, no. 3 (1990): 195-206.

Bott, Simon, et al. "Thiocalix[4] Arenes. I. Synthesis and Structure of Ethylthiocalix[4]arene Methyl Ether and the Related Structure of Bromocalix[4]arene Methyl Ether." Journal of Inclusion Phenomena and Molecular Recognition in Chemistry 9.3 (1990): 195-206.