| article html file updated | 7 February 2020 07:27 CET | Update | https://www.mdpi.com/1996-1073/9/4/298 |
| article html file updated | 5 May 2019 18:15 CEST | Update | - |
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| article html file updated | 28 April 2016 08:03 CEST | Update | - |
| article html file updated | 19 April 2016 13:42 CEST | Original file | - |
| article xml uploaded. | 19 April 2016 13:40 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/298/xml |
| article pdf uploaded. | 19 April 2016 13:40 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/298/pdf |
