1. M. Yu. Zueva, Candidate’s Dissertation in Engineering (Mosk. Gos. Univ. Lesa, Moscow, 2012).
2. Z. Virpsha and Ya. Bzhezin’skii, Aminoresins (Khimiya, Moscow, 1972) [in Russian].
3. B. M. Rybin, N. V. Eliseeva, and V. I. Azarov, “On the issue of choosing urea-formaldehyde resin modifiers when preparing a varnish composition for wood finishing,” Nauch. Trudy Mosk. Lesotekh. Inst., No. 242, 144–149 (1991).
4. R. O. Ebewer, G. E. Myers, B. H. River, and J. A. Koutsey, “Polyamine-modified urea-formaldehyde resins. I. Synthesis, structure and properties,” J. Appl. Polim. Sci. 42, 2997–3012 (1991).
5. N. I. Moskvitin, Bonding of Polymers (Lesnaya Prom-st’, Moscow, 1968) [in Russian].