| article html file updated | 7 February 2020 09:22 CET | Update | https://www.mdpi.com/1996-1073/9/6/416 |
| article html file updated | 5 May 2019 14:29 CEST | Update | N/A |
| article html file updated | 27 March 2019 05:56 CET | Update | N/A |
| article html file updated | 28 June 2016 09:27 CEST | Update | N/A |
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| article html file updated | 27 May 2016 11:54 CEST | Original file | N/A |
| article xml uploaded. | 27 May 2016 10:25 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/416/xml |
| article pdf uploaded. | 27 May 2016 10:25 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/416/pdf |
