| article html file updated | 8 February 2020 23:39 CET | Update | https://www.mdpi.com/2410-3896/2/4/38 |
| article html file updated | 29 September 2019 02:42 CEST | Update | N/A |
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| article html file updated | 10 December 2017 08:16 CET | Original file | N/A |
| article xml uploaded. | 10 December 2017 08:15 CET | Update | https://www.mdpi.com/2410-3896/2/4/38/xml |
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| article pdf uploaded. | 10 December 2017 08:15 CET | Version of Record | https://www.mdpi.com/2410-3896/2/4/38/pdf |