| article html file updated | 7 February 2020 06:26 CET | Update | https://www.mdpi.com/2304-8158/5/2/24 |
| article html file updated | 5 May 2019 20:22 CEST | Update | N/A |
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| article pdf uploaded. | 25 March 2016 10:21 CET | Version of Record | https://www.mdpi.com/2304-8158/5/2/24/pdf |
