HROLS, Jurij et al. Forest reproduction and complex utilization of wood in Latvia. In Les - Drevo - Životné prostredie '97 : Sekcia č.6: Technológia spracovania dreva a využitie dreva v komplexnom interéri. Working Group Nř6: Technology of Wood processing and Utilization of Wood in Complex Interier. ISBN 80-228-0626-9, 1997, s. 27-31.