Changes in chemical structure of urea-formaldehyde condensates during synthesisSiimer, Kadri; Pehk, Tõnis; Christjanson, PeepInternational Conferences on Polymer Characterization : POLYCHAR-7, January 5-8, 1999 & Short course, January 4, 1999, Denton, USA : program and book of abstracts1999 / p. P-10