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Petkov O, Sirakov L, Belov Y, Sirakova I, Kolarova R, Torbova S, Popova N.Petkov O, et al. Among authors: kolarova r.Acta Physiol Pharmacol Bulg. 1981;7(4):49-57.Acta Physiol Pharmacol Bulg. 1981.PMID: 6954833
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Popova N, Petkov O, Kolarova R.Popova N, et al. Among authors: kolarova r.Eksp Med Morfol. 1982;21(3):122-6.Eksp Med Morfol. 1982.PMID: 6217062Bulgarian.No abstract available.