Broek TAB, Roberts ML.  2024.  Improving Ionplus MICADAS performance with recessed graphite. Radiocarbon. 

Longworth BE, Burton JR, Pendleton SL, Moser SD, Roberts ML, Kurz MD.  2022.  Radiocarbon measurement of CO2 from carbonate minerals using a hybrid gas ion source with an open split interface. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 531:49?55.