| article html file updated | 8 February 2020 19:09 CET | Update | https://www.mdpi.com/2226-4787/5/4/59 |
| article html file updated | 27 September 2019 22:31 CEST | Update | - |
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| article html file updated | 22 October 2017 13:58 CEST | Original file | - |
| article xml uploaded. | 22 October 2017 13:57 CEST | Original file | https://www.mdpi.com/2226-4787/5/4/59/xml |
| article pdf uploaded. | 22 October 2017 13:57 CEST | Version of Record | https://www.mdpi.com/2226-4787/5/4/59/pdf |
