IEJAVS, Jănis - SPULLE, Uldis - JAKOVLEVS, Vilnis. The comparison of properties of three-layer cellular material and wood-based panels. In Drewno. - Poznaň : Instytut technologii drewna, 2011. ISSN 1644-3985, 2011, vol. 54, nr. 185, s. 39-49.