| article html file updated | 7 February 2020 09:26 CET | Update | https://www.mdpi.com/1996-1073/9/6/415 |
| article html file updated | 5 May 2019 14:21 CEST | Update | N/A |
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| article xml uploaded. | 28 May 2016 11:04 CEST | Update | https://www.mdpi.com/1996-1073/9/6/415/xml |
| article pdf uploaded. | 28 May 2016 11:04 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/415/pdf |