| article html file updated | 7 February 2020 07:38 CET | Update | https://www.mdpi.com/2077-1444/7/4/41 |
| article html file updated | 5 May 2019 17:52 CEST | Update | - |
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| article html file updated | 28 April 2016 12:05 CEST | Update | - |
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| article xml uploaded. | 22 April 2016 16:31 CEST | Original file | https://www.mdpi.com/2077-1444/7/4/41/xml |
| article pdf uploaded. | 22 April 2016 16:31 CEST | Version of Record | https://www.mdpi.com/2077-1444/7/4/41/pdf |
