| article html file updated | 8 February 2020 03:19 CET | Update | https://www.mdpi.com/2077-1444/8/4/63 |
| article html file updated | 4 May 2019 02:43 CEST | Update | - |
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| article xml uploaded. | 12 April 2017 07:25 CEST | Update | https://www.mdpi.com/2077-1444/8/4/63/xml |
| article html file updated | 12 April 2017 05:44 CEST | Update | - |
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| article pdf uploaded. | 11 April 2017 14:04 CEST | Version of Record | https://www.mdpi.com/2077-1444/8/4/63/pdf |
