| article html file updated | 9 February 2020 02:25 CET | Update | https://www.mdpi.com/1996-1073/11/1/157 |
| article html file updated | 29 September 2019 18:33 CEST | Update | - |
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| article html file updated | 9 January 2018 10:01 CET | Original file | - |
| article xml uploaded. | 9 January 2018 10:00 CET | Update | https://www.mdpi.com/1996-1073/11/1/157/xml |
| article pdf uploaded. | 9 January 2018 09:59 CET | Version of Record | https://www.mdpi.com/1996-1073/11/1/157/pdf |
