Chong, S. Y.; Jones, J. T. A.; Khimyak, Y. Z.; Cooper, A. I.; Thomas, A.; Antonietti, M.; Bojdys, M. J. Tuning of gallery heights in a crystalline 2D carbon nitride network. J. Mater. Chem. A 2013, 1 (4), 1102-1107 DOI: 10.1039/C2TA01068B.