U.S. patent 1,583,441, William Blenko, "Art Glass and Method of Making the Same", issued May 4, 1926 https://patentimages.storage.googleapis.com/9c/c0/52/9978ab52194873/US1583441.pdf ↩
Contribution of the glass cladding to the overall structural behaviour of 19th-century iron and glass roofs https://biblio.ugent.be/publication/3079766/file/4336293.pdf ↩