| article html file updated | 7 February 2020 22:15 CET | Update | https://www.mdpi.com/2073-4360/9/2/37 |
| article html file updated | 23 September 2019 01:40 CEST | Update | - |
| article html file updated | 4 May 2019 13:33 CEST | Update | - |
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| article html file updated | 1 March 2017 11:09 CET | Update | - |
| article html file updated | 25 January 2017 13:46 CET | Original file | - |
| article xml uploaded. | 25 January 2017 13:44 CET | Original file | https://www.mdpi.com/2073-4360/9/2/37/xml |
| article pdf uploaded. | 25 January 2017 13:44 CET | Version of Record | https://www.mdpi.com/2073-4360/9/2/37/pdf |
