1. Encyclopaedia Britannicaonline. available at:http://www.britannica.com/eb/article‐9000232.
2. https://en.wikipedia.org/wiki/Virtual_museum#:~:text=Now%20the%20History%20of%20Science and%20other%20artworks%20and%20artifacts.
3. www.mhs.ox.ac.uk/measurer/text/contents.htm
4. https://ec.europa.eu/futurium/en/system/files/ged/rch_thinkpapers_06.pdf