| article html file updated | 8 February 2020 07:32 CET | Update | https://www.mdpi.com/2077-0375/7/2/29 |
| article html file updated | 25 September 2019 04:34 CEST | Update | - |
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| article html file updated | 29 June 2017 11:38 CEST | Update | - |
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| article xml uploaded. | 6 June 2017 08:35 CEST | Update | https://www.mdpi.com/2077-0375/7/2/29/xml |
| article pdf uploaded. | 6 June 2017 08:35 CEST | Version of Record | https://www.mdpi.com/2077-0375/7/2/29/pdf |
