| article html file updated | 9 February 2020 04:59 CET | Update | https://www.mdpi.com/2073-4344/8/2/54 |
| article html file updated | 30 September 2019 09:18 CEST | Update | - |
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| article html file updated | 14 March 2018 08:41 CET | Update | - |
| article html file updated | 31 January 2018 10:06 CET | Original file | - |
| article xml uploaded. | 31 January 2018 10:05 CET | Original file | https://www.mdpi.com/2073-4344/8/2/54/xml |
| article pdf uploaded. | 31 January 2018 10:05 CET | Version of Record | https://www.mdpi.com/2073-4344/8/2/54/pdf |
