MASS SPECTROMETRIC STUDY OF BRADYKININ-RELATED PEPTIDES (BRPS) FROM THE SKIN SECRETION OF RUSSIAN RANID FROGS СтатьяSamgina T.Y., Gorshkov V.A., Vorontsov Y.A., Lebedev A.T., Artemenko K.A., Zubarev R.A.Rapid Communications in Mass Spectrometry. Том 25. 2011. С. 933-940