@article {1807.04256, archivePrefix = {arXiv}, eprint = {1807.04256}, primaryClass = {cond-mat.str-el}, author = {Donato Farina and others}, title = {Electron-phonon coupling in undoped cuprate $YBa_2Cu_3O_6$ estimated from Raman and optical conductivity spectra}, year = {2018}, url = {http://arxiv.org/abs/1807.04256} }