1. Ultrastructure of Treponema microdentium and Borrelia vincentii;Bladen H. A.;J. Bacteriol.,1964
2. Fine structure of Spirochaeta stenostrepta, a free-living, anaerobic spirochete;Holt S. C.;J. Bacteriol.,1968
3. Further observations on the ultrastructure of Treponema pallidum Nichols;Hovind Hougen K.;Acta Pathol. Microbiol. Scand.,1972
4. Electron microscopy of endoflagella and microtubules in Treponema Reiter;Hovind Hougen K.;Acta Pathol. Microbiol. Scand.,1971
5. Electron microscopy of Treponema cuniculi;Hovind Hougen K.;Acta Pathol. Microbiol. Scand.,1973