Wenzl T, de la Calle B, Gatermann R, Hoenicke K, Ulberth F, Anklam E. Evaluation of the results from an inter-laboratory comparison study of the determination of acrylamide in crispbread and butter cookies. Analytical and Bioanalytical Chemistry. 2004 Apr 08;379(3):449–57. doi: 10.1007/s00216-004-2591-4.