Isolation of microbial strains producing beta-lactamases with extended spectrum from hospital environment / Roxana Moldovan [et al.] Bibliogr.: p. 182. - Abstr. eng. In: Central European Journal of Occupational and Environmental Medicine. - ISSN 1219-1221. - 2000. 6. évf. 2-3. sz., p. 176-182. : ill.