University of Glasgow 2011. "Sigrid Fridman". University of Glasgow. Glasgow, Scotland: Mapping the Practice and Profession of Sculpture in Britain and Ireland 1851-1951. 2011. Archived from the original on 4 March 2015. Retrieved 23 October 2017.
University of Glasgow 2011. "Sigrid Fridman". University of Glasgow. Glasgow, Scotland: Mapping the Practice and Profession of Sculpture in Britain and Ireland 1851-1951. 2011. Archived from the original on 4 March 2015. Retrieved 23 October 2017.