Cianfarani, Cesidio; Cisbani, Evaristo; Orlandi, Gianluca; Frullani, Salvatore; Picardi, Luigi «F-18 production with the TOP linac injector» (en anglès). Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 562, 2, 23-06-2006, pàg. 1060–1063. DOI: 10.1016/j.nima.2006.02.095. ISSN: 0168-9002.
Soddy, Frederick «The origins of the conceptions of isotopes» (PDF) (en anglès). Nobel Lectures, Desembre 1922, pàg. 393 [Consulta: 29 agost 2021]. «Thus the chemically identical elements - or isotopes, as I called them for the first time in this letter to Nature, because they occupy the same place in the Periodic Table - are elements with the same algebraic or nettnuclear charge, but with different numbers of + and - charges in the nucleus.»
«The Nobel Prize in Chemistry 1921» (en anglès). The Nobel Prize. The official website of the Nobel Prize. [Consulta: 29 agost 2021].
Cianfarani, Cesidio; Cisbani, Evaristo; Orlandi, Gianluca; Frullani, Salvatore; Picardi, Luigi «F-18 production with the TOP linac injector» (en anglès). Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 562, 2, 23-06-2006, pàg. 1060–1063. DOI: 10.1016/j.nima.2006.02.095. ISSN: 0168-9002.
Cianfarani, Cesidio; Cisbani, Evaristo; Orlandi, Gianluca; Frullani, Salvatore; Picardi, Luigi «F-18 production with the TOP linac injector» (en anglès). Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 562, 2, 23-06-2006, pàg. 1060–1063. DOI: 10.1016/j.nima.2006.02.095. ISSN: 0168-9002.