Verheul, A. F., Braat, A. K., Leenhouts, J. M., Hoogerhout, P., Poolman, J. T., Snippe, H., & Verhoef, J. (1991). Preparation, characterization, and immunogenicity of meningococcal immunotype L2 and L3,7,9 phosphoethanolamine group-containing oligosaccharide-protein conjugates.

Verheul, A F., A K. Braat, J M. Leenhouts, P. Hoogerhout, J T. Poolman, H. Snippe, e J. Verhoef. Preparation, Characterization, and Immunogenicity of Meningococcal Immunotype L2 and L3,7,9 Phosphoethanolamine Group-containing Oligosaccharide-protein Conjugates. 1991.

Verheul, A F., et al. Preparation, Characterization, and Immunogenicity of Meningococcal Immunotype L2 and L3,7,9 Phosphoethanolamine Group-containing Oligosaccharide-protein Conjugates. 1991.