| article html file updated | 8 February 2020 21:24 CET | Update | https://www.mdpi.com/2411-5134/2/4/31 |
| article html file updated | 28 September 2019 12:54 CEST | Update | - |
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| article xml uploaded. | 17 November 2017 20:12 CET | Original file | https://www.mdpi.com/2411-5134/2/4/31/xml |
| article pdf uploaded. | 17 November 2017 20:12 CET | Updated version of record | https://www.mdpi.com/2411-5134/2/4/31/pdf |
| article pdf uploaded. | 16 November 2017 14:29 CET | Version of Record | https://www.mdpi.com/2411-5134/2/4/31/pdf-vor |
