@inbook{ BOJKOV_HRISTOVA:331-334,

author = { NIKOLAY BOJKOV VASSILEV and MARIA HRISTOVA VASSILEVA } ,

title = { INFLUENCE OF REACTOR MODE ON CITRIC ACID PRODUCTIVITY OF ASPERGILLUS NIGER IMMOBILIZED ON POLYURETHANE FOAM },

booktitle = { PHISIOLOGY OF IMMOBILIZED CELLS },

isbn = { 0-444-42700-7 },

publisher = { ELSEVIER SCIENCE },

pages = { 331 - 334 },

year = { 1990 },

}