Borshch, V., Kim, Y. -K., Xiang, J., Gao, M., Jákli, A., Panov, V. P., Vij, J. K., Imrie, C. T., Tamba, M. G., Mehl, G. H., Lavrentovich, O. D., "Nematic twist-bend phase with nanoscale modulation of molecular orientation", Nature Communications, 2013