Functional Characterization of IS 1999 , an IS 4 Family Element Involved in Mobilization and Expression of β-Lactam Resistance Genes
Re‐evaluation of Quillaia extract (E 999) as a food additive and safety of the proposed extension of use
Follow‐up of the re‐evaluation of quillaia extract (E 999) as a food additive and safety of the proposed extension of uses
