A unified framework for the numerical evaluation of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si340.svg" display="inline" id="d1e2190"><mml:mi>Q</mml:mi></mml:math>-subtractive Kramers–Kronig relations and application to the reconstruction of optical constants of quartz
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy