calcium

[1988] [Search and Discovery] Negative Calcium Ions Are Stable-In Spite of the Conventional Wisdom ; Bertram Schwarzschild ; Physics Today 41 (jun 1988) p. 21 [lien]
[2013] Weighing exotic calcium isotopes ; Bertram M. Schwarzschild ; Physics Today 66 (sep 2013) p. 15 [lien]