| article html file updated | 7 February 2020 21:24 CET | Update | https://www.mdpi.com/2073-4441/9/1/48 |
| article html file updated | 22 September 2019 21:02 CEST | Update | - |
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| article html file updated | 7 February 2017 04:32 CET | Update | - |
| article html file updated | 13 January 2017 12:44 CET | Original file | - |
| article xml uploaded. | 13 January 2017 12:43 CET | Original file | https://www.mdpi.com/2073-4441/9/1/48/xml |
| article pdf uploaded. | 13 January 2017 12:43 CET | Version of Record | https://www.mdpi.com/2073-4441/9/1/48/pdf |
