Willén , Roger, Birgitta Carlén, Xin Wang, Nicos Papadogiannakis, Rolf Odselius, and Torkel Wadström. 2000. “Morphologic Conversion of Helicobacter Pylori from Spiral to Coccoid Form: Scanning (SEM) and Transmission Electron Microscopy (TEM) Suggest Viability: Scanning (SEM) and Transmission Electron Microscopy (TEM) Suggest Viability”. Upsala Journal of Medical Sciences 105 (1):31-40. https://doi.org/10.1517/03009734000000045.