Batsanov, A.S., Collings, J.C., Ward, R.M., Goeta, A.E., Porres, L., Beeby, A., Howard, J.A.K., Steed, J.W., Marder, T.B., "Crystal engineering with ethynylbenzenes Part 2. Structures of 4-trimethylsilylethynyl-N,N-dimethylaniline, and 4-ethynyl-N,N-dimethylaniline with Z '=12 and a single-crystal to single-crystal phase transition at 122.5 +/- 2 K", CrystEngComm, 2006