| article html file updated | 7 February 2020 22:38 CET | Update | https://www.mdpi.com/2227-7102/7/1/22 |
| article html file updated | 23 September 2019 03:40 CEST | Update | - |
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| article html file updated | 27 October 2017 09:55 CEST | Update | - |
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| article xml uploaded. | 4 February 2017 09:53 CET | Original file | https://www.mdpi.com/2227-7102/7/1/22/xml |
| article pdf uploaded. | 4 February 2017 09:53 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/22/pdf |
