| article html file updated | 9 February 2020 11:28 CET | Update | https://www.mdpi.com/2227-9091/6/2/28 |
| article html file updated | 2 October 2019 00:37 CEST | Update | - |
| article html file updated | 1 May 2019 08:16 CEST | Update | - |
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| article html file updated | 27 June 2018 09:49 CEST | Update | - |
| article html file updated | 27 March 2018 16:57 CEST | Original file | - |
| article xml uploaded. | 27 March 2018 14:12 CEST | Update | https://www.mdpi.com/2227-9091/6/2/28/xml |
| article pdf uploaded. | 27 March 2018 14:11 CEST | Version of Record | https://www.mdpi.com/2227-9091/6/2/28/pdf |
