| article html file updated | 9 February 2020 01:51 CET | Update | https://www.mdpi.com/2227-9059/6/1/7 |
| article html file updated | 29 September 2019 15:29 CEST | Update | - |
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| article html file updated | 26 March 2018 15:53 CEST | Update | - |
| article html file updated | 3 January 2018 09:28 CET | Original file | - |
| article xml uploaded. | 3 January 2018 09:25 CET | Original file | https://www.mdpi.com/2227-9059/6/1/7/xml |
| article pdf uploaded. | 3 January 2018 09:25 CET | Version of Record | https://www.mdpi.com/2227-9059/6/1/7/pdf |
