| article html file updated | 7 February 2020 23:25 CET | Update | https://www.mdpi.com/2073-4360/9/2/64 |
| article html file updated | 23 September 2019 08:05 CEST | Update | - |
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| article html file updated | 1 March 2017 11:15 CET | Update | - |
| article html file updated | 15 February 2017 09:17 CET | Original file | - |
| article xml uploaded. | 15 February 2017 09:15 CET | Original file | https://www.mdpi.com/2073-4360/9/2/64/xml |
| article pdf uploaded. | 15 February 2017 09:15 CET | Version of Record | https://www.mdpi.com/2073-4360/9/2/64/pdf |
