548,241 BJÔRK LARS Studies on techniques for the improvement of secondary metabolism derived from squalene in tissue cultures of higher plants : [doctoral dissertation] / by Lars Bjork. - Uppsala : Academiae Upsaliensis, 1990. - 65 s. : wykr. ; 25 cm (Acta Universitatis Upsaliensis : Comprehensive Summaries of Uppsala Disertations from the Faculty of Pharmacy, ISSN 0282-7484 ; 67) ISBN 91-554-2603-4