| article html file updated | 7 February 2020 10:18 CET | Update | https://www.mdpi.com/1996-1073/9/6/463 |
| article html file updated | 5 May 2019 12:42 CEST | Update | - |
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| article html file updated | 28 June 2016 09:35 CEST | Update | - |
| article html file updated | 17 June 2016 10:33 CEST | Original file | - |
| article xml uploaded. | 17 June 2016 10:31 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/463/xml |
| article pdf uploaded. | 17 June 2016 10:31 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/463/pdf |
