Preparation of Trimethyl Borate //[have B(OMe)3 in MeOH, last purification step here]// - Magpie, Science Madness
http://www.sciencemadness.org/talk/viewthread.php?tid=16439Preparation and Purification of Methyl Borate and Ethyl Borate - Webster, 1933
Procedures for the Preparation of Methyl Borate - Schlesinger, 1953