| article html file updated | 8 February 2020 23:48 CET | Update | https://www.mdpi.com/2227-9040/5/4/34 |
| article html file updated | 29 September 2019 03:36 CEST | Update | N/A |
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| article html file updated | 12 December 2017 08:41 CET | Original file | N/A |
| article xml uploaded. | 12 December 2017 08:39 CET | Original file | https://www.mdpi.com/2227-9040/5/4/34/xml |
| article pdf uploaded. | 12 December 2017 08:39 CET | Version of Record | https://www.mdpi.com/2227-9040/5/4/34/pdf |
