CYCLIZATION OF N,N-DIALKYLDITHIOCARBAMATE AND ALKYLXANTHATE DERIVATIVES OF POLYHALOGENATED PYRIDINES IN GAS AND LIQUID PHASES Статья Samguina T.Yu., Lobodin V.V., Karakhanova N.K., Lebedev A.T., Sipyagin A.M. European Journal of Mass Spectrometry. IM Publications LLP. Том 10. 2004. С. 57-62