@inbook{ HRISTOVA_BOJKOV:773-779,
author = { MARIA HRISTOVA VASSILEVA and NIKOLAY BOJKOV VASSILEV } ,
title = { SOLUBILIZATION OF NATURAL HYDROXYAPATITE BY LACTIC ACID PRODUCING RHIZOPUS ARRHIZUS IMMOBILIZED IN POLYURETHANE FOAM },
booktitle = { GEO-SCIENCE AND ENVIRONMENT },
publisher = { GEOSCIENCE SGEM LTD },
pages = { 773 - 779 },
year = { 2010 },
}