[1]SPRAGUE;CWALINA;JENKINS[JournaloftheAmericanPharmaceuticalAssociation(1961),1953,vol.42,#8,p.474-476]
[1]BulletinoftheAcademyofSciencesoftheUSSRDivisionofChemicalScience,1979,vol.28,p.1916-1919 IzvestiyaAkademiiNaukSSSR,SeriyaKhimicheskaya,1979,vol.28,p.2079-2082