| article html file updated | 7 February 2020 05:32 CET | Update | https://www.mdpi.com/2297-8747/21/1/3 |
| article html file updated | 5 May 2019 22:14 CEST | Update | - |
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| article pdf uploaded. | 8 March 2016 09:46 CET | Updated version of record | https://www.mdpi.com/2297-8747/21/1/3/pdf |
| article xml uploaded. | 8 March 2016 09:46 CET | Update | https://www.mdpi.com/2297-8747/21/1/3/xml |
| article pdf uploaded. | 7 March 2016 11:53 CET | Version of Record | https://www.mdpi.com/2297-8747/21/1/3/pdf-vor |
