Heise, Henrike; Sakellariou, Dimitris; Meriles, Carlos A.; Moule, Adam & Pines, Alexander. Two-dimensional high-resolution NMR spectra in matched b0 and b1 field gradients, article, January 9, 2002; (https://digital.library.unt.edu/ark:/67531/metadc735878/m1/1/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .