| article html file updated | 9 February 2020 06:04 CET | Update | https://www.mdpi.com/1996-1944/11/2/270 |
| article html file updated | 30 September 2019 16:03 CEST | Update | - |
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| article html file updated | 9 February 2018 17:37 CET | Original file | - |
| article xml uploaded. | 9 February 2018 17:36 CET | Original file | https://www.mdpi.com/1996-1944/11/2/270/xml |
| article pdf uploaded. | 9 February 2018 17:36 CET | Version of Record | https://www.mdpi.com/1996-1944/11/2/270/pdf |
