Dzięgielewska, M., Adamska, I., Mikiciuk, M., Nowak, G. and Ptak, P. 2017. Effects of biotic and abiotic factors on the health of horse chestnut trees in an urban area of north-western Poland. Ecological Questions. 27, (Dec. 2017), 25–38. DOI:https://doi.org/10.12775/EQ.2017.025.