| article html file updated | 8 February 2020 16:25 CET | Update | https://www.mdpi.com/1996-1073/10/9/1421 |
| article html file updated | 27 September 2019 04:47 CEST | Update | - |
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| article html file updated | 30 September 2017 07:59 CEST | Update | - |
| article html file updated | 16 September 2017 11:45 CEST | Original file | - |
| article xml uploaded. | 16 September 2017 11:43 CEST | Original file | https://www.mdpi.com/1996-1073/10/9/1421/xml |
| article pdf uploaded. | 16 September 2017 11:43 CEST | Version of Record | https://www.mdpi.com/1996-1073/10/9/1421/pdf |
