| article html file updated | 9 February 2020 03:11 CET | Update | https://www.mdpi.com/2075-4701/8/1/57 |
| article html file updated | 29 September 2019 22:49 CEST | Update | - |
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| article html file updated | 15 January 2018 17:57 CET | Original file | - |
| article xml uploaded. | 15 January 2018 17:56 CET | Original file | https://www.mdpi.com/2075-4701/8/1/57/xml |
| article pdf uploaded. | 15 January 2018 17:56 CET | Version of Record | https://www.mdpi.com/2075-4701/8/1/57/pdf |
