| article html file updated | 7 February 2020 21:10 CET | Update | https://www.mdpi.com/2311-7524/3/1/23 |
| article html file updated | 4 May 2019 15:58 CEST | Update | - |
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| article xml uploaded. | 13 January 2017 08:29 CET | Update | https://www.mdpi.com/2311-7524/3/1/23/xml |
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| article html file updated | 11 January 2017 14:25 CET | Update | - |
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| article xml uploaded. | 11 January 2017 14:24 CET | Original file | - |
| article pdf uploaded. | 11 January 2017 14:24 CET | Version of Record | https://www.mdpi.com/2311-7524/3/1/23/pdf-vor |
