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van der Lijn, C., Nurmi, M., Hasanen, E., Pyykönen, J., Salmi, L., Salmikangas, A.-K., Vehkakoski, K., Virmasalo, I., Toivonen, T. and Muukkonen, P. 2022. Assessing travel time-based accessibility to outdoor ice skating fields for children in Helsinki during the COVID-19 pandemic. Fennia - International Journal of Geography. 200, 1 (Dec. 2022), 6–23. DOI:https://doi.org/10.11143/fennia.114590.