1. Morphine levels in urine subsequent to poppy seed consumption;Fritschi;Forensic Sci. Int.,1985
2. concentrations of morphine and codeine in serum and urine after ingestion of poppy seeds;Hayes;Clin. Chem.,1987
3. Poppy seeds ingestion and opiates urinalysis: a closer look;ElSohly;Clin. Chem.,1990
4. Mohnkuchen als mögliche ursache von positiven befunden bei Dopingkontrollen;Clausnitzer;Medizin und Sport,1991
5. H. Sachs, R. Schmid, G. Hege-Scheuing, B. Schwilk, Morphine concentrations in hair, blood and urine after consumption of poppy seeds and oral application of MST tablets. Institute of Legal Medicine Munich, Institute of Legal Medicine Ulm, Center of Anaesthesiology. Ulm, Germany (1994).