[1]JournaloftheAmericanChemicalSociety,1955,vol.77,p.1054
[2]ZhurnalObshcheiKhimii,1956,vol.26,p.1733,1734;engl.Ausg.S.1945
[3]Patent:WO2008/103277,2008,A2.Locationinpatent:Page/Pagecolumn168-169
[4]Patent:US2019/31624,2019,A1.Locationinpatent:Paragraph0464-0465