Sparks T. H., Górska-Zajączkowska M., Wójtowicz W., Tryjanowski P., 2011. Phenological changes and reduced seasonal synchrony in western Poland. International Journal of Biometeorology, 55: 447-453. link - Ogród Botaniczny Uniwersytetu im. Adama Mickiewicza w Poznaniu

Sparks T. H., Górska-Zajączkowska M., Wójtowicz W., Tryjanowski P., 2011. Phenological changes and reduced seasonal synchrony in western Poland. International Journal of Biometeorology, 55: 447-453. link

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