| article html file updated | 7 February 2020 20:29 CET | Update | https://www.mdpi.com/2223-7747/6/1/3 |
| article html file updated | 22 September 2019 16:16 CEST | Update | - |
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| article html file updated | 30 March 2017 09:41 CEST | Update | - |
| article html file updated | 30 December 2016 08:39 CET | Original file | - |
| article xml uploaded. | 30 December 2016 08:38 CET | Update | https://www.mdpi.com/2223-7747/6/1/3/xml |
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| article pdf uploaded. | 30 December 2016 08:38 CET | Version of Record | https://www.mdpi.com/2223-7747/6/1/3/pdf |
