Robuta

https://www.hiskp.uni-bonn.de/index.php?id=96&L=1%252F%255C%27%2520and%2520char%28124%29%2520user%2520char%28124%29%253D0%2520and%2520%252F%255C%27%252F%255C%27%253D%252F%255C%27 HISKP: Isotopenseparator