| article html file updated | 8 February 2020 06:04 CET | Update | https://www.mdpi.com/2297-8739/4/2/19 |
| article html file updated | 24 September 2019 21:01 CEST | Update | - |
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| article html file updated | 17 May 2017 14:10 CEST | Original file | - |
| article xml uploaded. | 17 May 2017 14:09 CEST | Update | https://www.mdpi.com/2297-8739/4/2/19/xml |
| article pdf uploaded. | 17 May 2017 14:09 CEST | Version of Record | https://www.mdpi.com/2297-8739/4/2/19/pdf |
