| article html file updated | 8 February 2020 19:52 CET | Update | https://www.mdpi.com/2227-9059/5/4/63 |
| article html file updated | 28 September 2019 02:50 CEST | Update | - |
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| article html file updated | 2 January 2018 16:40 CET | Update | - |
| article html file updated | 30 October 2017 14:12 CET | Original file | - |
| article xml uploaded. | 30 October 2017 14:10 CET | Original file | https://www.mdpi.com/2227-9059/5/4/63/xml |
| article pdf uploaded. | 30 October 2017 14:10 CET | Version of Record | https://www.mdpi.com/2227-9059/5/4/63/pdf |
