| article html file updated | 7 February 2020 07:25 CET | Update | https://www.mdpi.com/1996-1073/9/4/294 |
| article html file updated | 5 May 2019 18:20 CEST | Update | - |
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| article html file updated | 28 April 2016 08:01 CEST | Update | - |
| article html file updated | 18 April 2016 14:00 CEST | Original file | - |
| article xml uploaded. | 18 April 2016 13:59 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/294/xml |
| article pdf uploaded. | 18 April 2016 13:59 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/294/pdf |
