Perfluorinated Alkyl Acids in Blood Serum from Primiparous Women in Sweden: Serial Sampling during Pregnancy and Nursing, And Temporal Trends 1996–2010Anders Glynn, Per Ola Darnerud, Shahid Ullah et al.|Environmental Science & Technology|2012Cited by 416
Simultaneous determination of perfluoroalkyl phosphonates, carboxylates, and sulfonates in drinking waterShahid Ullah, Urs Berger, Tomas Alsberg|Journal of Chromatography A|2011Cited by 121
Polyfluoroalkyl phosphate esters and perfluoroalkyl carboxylic acids in target food samples and packaging—method development and screeningWouter A. Gebbink, Urs Berger, Shahid Ullah et al.|Environmental Science and Pollution Research|2013Cited by 97
A matrix effect-free method for reliable quantification of perfluoroalkyl carboxylic acids and perfluoroalkane sulfonic acids at low parts per trillion levels in dietary samplesRobin Vestergren, Urs Berger, Shahid Ullah et al.|Journal of Chromatography A|2012Cited by 85
Determination of perfluoroalkyl carboxylic, sulfonic, and phosphonic acids in foodShahid Ullah, Urs Berger, Tomas Alsberg et al.|Analytical and Bioanalytical Chemistry|2012Cited by 36