1: https://people.physics.anu.edu.au/~ecs103/chart/

2: https://www-nds.iaea.org/relnsd/vcharthtml/VChartHTML.html

3: wikipediassa https://upload.wikimedia.org/wikipedia/commons/b/b5/NuclideMap_stitched.png

4: http://atom.kaeri.re.kr/nuchart/?zlv=2