Improved high performance liquid chromatographic method for the quantification of 3 methylhistidine in serum and urine Fermo I.; De Vecchi E.; Arcelloni C.; Brambilla P.; Pastoris A.; Paroni R. Journal of Liquid Chromatography 14(9): 1715-1728 1991 https://eurekamag.com/research/007/435/007435095.php