1. Serological properties of lipopolysaccharide from oral strains of Bacteroides melaninogenicus.;Hofstad;J. Bact.,1969
2. The distribution of heptose and 2-keto-3-deoxy-octonate in Bacteroidaceae.;Hofstad;J. gen. Microbiol.,1974
3. O-antigenic specificity of lipopolysaccharides from Bacteroides fragilis ss. fragilis.;Hofstad;Acta path, microbiol. scand. Sect. B.,1975
4. Purification of the O antigen of Bacteroides fragilis ss. fragilis NCTC 9343 from phenol-water extracts by gel filtration and chromatography on DEAE-cellulose and hydroxylapatite.;Hofstad;Acta path, microbiol. scand. Sect. B.,1976
5. Chemical characteristics of endotoxin from Bacteroides fragilis NCTC 9343;Hofstad;J. gen. Microbiol.,1970