HUENNEKENS F M, OSBORN M J, WHITELEY H R
Science. 1958 Jul 18;128(3316):120-4. doi: 10.1126/science.128.3316.120.
The above reactions involving "active formyl" and "active hydroxymethyl" groups, their interconversion, their connections with free HCOOH and HCHO, and their interdigitation with methyl groups are diagrammed in Fig. 1.