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- Echinococcosis in childhood - a serious problem in today's Bulgaria / V. Stanev ... [et al.] . Helminthologia. - ISSN 0440-6605 . - Vol. 36, supl. (1999), s. 47
- C 2195
- Unnecessary risks to children health / P. Tchakurova ... [et al.] . Helminthologia. - ISSN 0440-6605 . - Vol. 36, supl. (1999), s. 48
- C 2195