Haarala, A., Linjamäki, J.-A., Tuominen, H. and Kähönen, M. (2017) “High Resolution Manometry and pH stepup method on the localisation of the lower esophageal sphincter”, Journal of Gastrointestinal and Liver Diseases, 26(4), pp. 425-429. doi: 10.15403/jgld.2014.1121.264.haa.