Lack of surface receptors rather than possession of a restriction-modification system determines F4 phage resistance in Streptococcus bovis II/1 I. Štyriak, P. Pristaš and P. JavorskýReprod. Nutr. Dev., 37 Suppl. 1 (1997) 76DOI: https://doi.org/10.1051/rnd:19970760