| article html file updated | 7 February 2020 18:12 CET | Update | https://www.mdpi.com/2075-163X/6/4/123 |
| article html file updated | 22 September 2019 05:59 CEST | Update | - |
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| article html file updated | 30 December 2016 06:12 CET | Update | - |
| article html file updated | 18 November 2016 05:16 CET | Original file | - |
| article xml uploaded. | 18 November 2016 05:14 CET | Original file | https://www.mdpi.com/2075-163X/6/4/123/xml |
| article pdf uploaded. | 18 November 2016 05:14 CET | Version of Record | https://www.mdpi.com/2075-163X/6/4/123/pdf |
