| article html file updated | 7 February 2020 07:35 CET | Update | https://www.mdpi.com/2073-4360/8/4/157 |
| article html file updated | 21 September 2019 15:39 CEST | Update | - |
| article html file updated | 5 May 2019 17:59 CEST | Update | - |
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| article html file updated | 29 April 2016 10:04 CEST | Update | - |
| article html file updated | 21 April 2016 08:37 CEST | Original file | - |
| article xml uploaded. | 21 April 2016 08:36 CEST | Update | https://www.mdpi.com/2073-4360/8/4/157/xml |
| article pdf uploaded. | 21 April 2016 08:36 CEST | Version of Record | https://www.mdpi.com/2073-4360/8/4/157/pdf |
