?,?-N,N-DIMETHYLAMINOALKYLAMINES AS POSSIBLE DERIVATIZATION AGENTS FOR THE ANALYSIS OF SMALL CARBONYL COMPOUNDS BY LOW ENERGY MASS SPECTROMETRY Статья Zhilyaev D.I., Borisov R.S., Polovkov N.Yu., Zaikin V.G. European Journal of Mass Spectrometry. IM Publications LLP. Том vol 22. 2016. С. 151-158