| article html file updated | 7 February 2020 20:02 CET | Update | https://www.mdpi.com/2227-9067/3/4/45 |
| article html file updated | 22 September 2019 13:45 CEST | Update | N/A |
| article html file updated | 4 May 2019 18:22 CEST | Update | N/A |
| article html file updated | 27 December 2016 02:28 CET | Update | N/A |
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| article xml uploaded. | 21 December 2016 10:24 CET | Original file | https://www.mdpi.com/2227-9067/3/4/45/xml |
| article pdf uploaded. | 21 December 2016 10:24 CET | Version of Record | https://www.mdpi.com/2227-9067/3/4/45/pdf |
