William LeRoy Emmet. Institute of Chemistry, The Hebrew University of Jerusalem. "Emmet". Archived from the original on 7 July 2009. Retrieved 14 September 2009.
"Messum's". Archived from the original on 23 November 2018. Retrieved 23 November 2018.
William LeRoy Emmet. Institute of Chemistry, The Hebrew University of Jerusalem. "Emmet". Archived from the original on 7 July 2009. Retrieved 14 September 2009.