15
Published in 2017
doi: 10.11698/PED.2017.02.13
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journal article online
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17
Published in 2019
doi: 10.12902/zfv-0243-2018
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journal article online
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18
Published in 2019
doi: 10.12902/zfv-0242-2018
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journal article online
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20
Published in 2018
doi: 10.1007/1345\2016\241
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conference paper or compendium article online
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