| article html file updated | 9 February 2020 00:53 CET | Update | https://www.mdpi.com/2297-8739/5/1/2 |
| article html file updated | 29 September 2019 09:57 CEST | Update | - |
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| article html file updated | 9 January 2018 13:42 CET | Update | - |
| article xml uploaded. | 9 January 2018 13:41 CET | Update | https://www.mdpi.com/2297-8739/5/1/2/xml |
| article pdf uploaded. | 9 January 2018 13:41 CET | Updated version of record | https://www.mdpi.com/2297-8739/5/1/2/pdf |
| article html file updated | 22 December 2017 11:51 CET | Original file | - |
| article xml uploaded. | 22 December 2017 11:49 CET | Original file | - |
| article pdf uploaded. | 22 December 2017 11:49 CET | Version of Record | https://www.mdpi.com/2297-8739/5/1/2/pdf-vor |
