The generalised Overhauser effect has been employed to indirectly detect weak lines and assign double quantum transitions in the NMR spectrum of orientated o-dichlorobenzene dissolved in N-(p-ethoxybenzylidene)-p'-n-butylaniline.
Arte, E., Degelaen, J., & Dereppe, J.-M. (1975). Use of the GOE effect for the assignment of weak lines and double quantum transitions in the spectrum of oriented o-dichlorobenzene. Journal of Chemical Physics, 63(7), 3171-3172. https://hdl.handle.net/2078.5/149263 (Original work published 1975)