MASS SPECTROMETRIC STUDY OF BRADYKININ-RELATED PEPTIDES (BRPS) FROM THE SKIN SECRETION OF RUSSIAN RANID FROGS Article Samgina T.Y., Gorshkov V.A., Vorontsov Y.A., Lebedev A.T., Artemenko K.A., Zubarev R.A. Rapid Communications in Mass Spectrometry. John Wiley and Sons Ltd. Vol. 25. 2011. P. 933-940