CEITEL, Jan - SZMYT, Janusz. Initial spacing and morphology of oak trees (Quercus robur L. and Quercus petraea /Matt./ Liebl.) in untended oak saplings at the age of 17 years. In Glasnik za šumske pokuse. - Šumarski fakultet Sveučilišta u Zagrebu : Zagreb. ISSN 0352-3861, 2000, vol. 37, s. 107-121.