| article html file updated | 11 February 2020 11:28 CET | Update | https://www.mdpi.com/2227-9059/7/1/9 |
| article html file updated | 27 April 2019 01:36 CEST | Update | N/A |
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| article html file updated | 25 January 2019 02:41 CET | Original file | N/A |
| article xml uploaded. | 24 January 2019 15:35 CET | Original file | https://www.mdpi.com/2227-9059/7/1/9/xml |
| article pdf uploaded. | 24 January 2019 15:35 CET | Version of Record | https://www.mdpi.com/2227-9059/7/1/9/pdf |
