| article html file updated | 8 February 2020 02:17 CET | Update | https://www.mdpi.com/2226-4310/4/2/19 |
| article html file updated | 24 September 2019 00:27 CEST | Update | - |
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| article xml uploaded. | 26 March 2017 09:03 CEST | Update | https://www.mdpi.com/2226-4310/4/2/19/xml |
| article pdf uploaded. | 26 March 2017 09:03 CEST | Version of Record | https://www.mdpi.com/2226-4310/4/2/19/pdf |