| article html file updated | 7 February 2020 06:39 CET | Update | https://www.mdpi.com/2073-8994/8/4/19 |
| article html file updated | 21 September 2019 14:17 CEST | Update | - |
| article html file updated | 5 May 2019 19:56 CEST | Update | - |
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| article html file updated | 27 April 2016 10:54 CEST | Update | - |
| article html file updated | 31 March 2016 10:52 CEST | Original file | - |
| article xml uploaded. | 31 March 2016 10:51 CEST | Original file | https://www.mdpi.com/2073-8994/8/4/19/xml |
| article pdf uploaded. | 31 March 2016 10:51 CEST | Version of Record | https://www.mdpi.com/2073-8994/8/4/19/pdf |
