Spectroscopy: PIXE

Olialy, P., Agha-Aligol, D., Shokouhi, F. and Lamehi-Rachti, M.,
“Analysis of Iranian Postage Stamps Belonging to the Qajar Dynasty (18th-20th Century’s(sic)) by Micro-PIXE,” X-Ray Spectrometry, 2009, Vol. 38, pp. 479-486.