| article html file updated | 9 February 2020 13:08 CET | Update | https://www.mdpi.com/2411-5134/3/2/21 |
| article html file updated | 2 October 2019 10:42 CEST | Update | N/A |
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| article html file updated | 10 April 2018 06:11 CEST | Original file | N/A |
| article xml uploaded. | 10 April 2018 06:10 CEST | Original file | https://www.mdpi.com/2411-5134/3/2/21/xml |
| article pdf uploaded. | 10 April 2018 06:10 CEST | Version of Record | https://www.mdpi.com/2411-5134/3/2/21/pdf |
