| article html file updated | 9 February 2020 06:41 CET | Update | https://www.mdpi.com/2073-4425/9/2/91 |
| article html file updated | 30 September 2019 19:37 CEST | Update | - |
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| article html file updated | 14 March 2018 17:07 CET | Update | - |
| article html file updated | 14 February 2018 16:05 CET | Original file | - |
| article xml uploaded. | 14 February 2018 16:04 CET | Original file | https://www.mdpi.com/2073-4425/9/2/91/xml |
| article pdf uploaded. | 14 February 2018 16:04 CET | Version of Record | https://www.mdpi.com/2073-4425/9/2/91/pdf |
