Measurements of some physiological parameters as a productivity index in poplar clones : P. trichocarpa Torr. et. Gary, P. deltoides March. cv. "Lux", P. x euramericana (Dode) Guinier cv. regenerata, P. x euramericana (Dode) Guinier cv. "Panonia" - Božič, Gregor (Array, 1995)
1st Slovenian symposium on plant physiology, Gozd Martuljek, 29.9.-1.10.1993