Published Discarded tyre rubber as concrete aggregate: a possible outlet for used tyres by Mavroulidou A. and Figueiredo J. 359-367_617_MAVROULIDOU_12-4.pdf
Published Activated carbon amendment to remediate contaminated sediments and soils: a review by Hilber I. and Bucheli T.D. 305-317_723_Bucheli_12-3.pdf
Published Malaria situation in Bulgaria and surveillance measures (1991-2000) by Kurdova R.I., Vutchev D.I. and Petrov P.P. Kurdova_153_162.pdf