| article html file updated | 8 February 2020 23:10 CET | Update | https://www.mdpi.com/2218-273X/7/4/80 |
| article html file updated | 28 September 2019 23:58 CEST | Update | - |
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| article html file updated | 5 December 2017 11:12 CET | Original file | - |
| article xml uploaded. | 5 December 2017 11:11 CET | Original file | https://www.mdpi.com/2218-273X/7/4/80/xml |
| article pdf uploaded. | 5 December 2017 11:11 CET | Version of Record | https://www.mdpi.com/2218-273X/7/4/80/pdf |
