“Comparison of quantitative NMR and IRMS spectrometry for the authentication of 'Polish Vodka’” Grzegorz Ciepielowski, Barbara Pacholczyk-Sienicka, Tomasz Frączek, Kamila Klajman, Piotr Paneth, Łukasz Albrecht Journal of the Science of Food and Agriculture, 99, 263-268 (2019)