https://www.thevespiary.org/rhodium/Rhodium/chemistry/nxs.txt (https://www.thevespiary.org/rhodium/Rhodium/chemistry/nxs.txt)
https://www.thevespiary.org/rhodium/Rhodium/chemistry/2c-c.pdf (https://www.thevespiary.org/rhodium/Rhodium/chemistry/2c-c.pdf)