Correlation of chemical structure of urea-formaldehyde resins with formaldehyde emission from particleboardsSiimer, Kadri; Lasn, Ilmar; Laht, A.; Peterson, AleksanderTallinna Tehnikaülikooli Toimetised1994 / lk. 34-46: ill

1H and 13C NMR study of substituted tetrahydro-1,3,5-triazine(1H)-2-ones formationChristjanson, Peep; Siimer, Kadri; Laht, A.; Oja, HolgerTallinna Tehnikaülikooli Toimetised1992 / lk. 10-20: ill