| article html file updated | 8 February 2020 22:46 CET | Update | https://www.mdpi.com/2218-2004/5/4/49 |
| article html file updated | 28 September 2019 21:28 CEST | Update | N/A |
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| article html file updated | 1 December 2017 11:16 CET | Original file | N/A |
| article xml uploaded. | 1 December 2017 11:15 CET | Original file | https://www.mdpi.com/2218-2004/5/4/49/xml |
| article pdf uploaded. | 1 December 2017 11:15 CET | Version of Record | https://www.mdpi.com/2218-2004/5/4/49/pdf |
