| article html file updated | 9 February 2020 00:38 CET | Update | https://www.mdpi.com/2227-7102/7/4/91 |
| article html file updated | 29 September 2019 08:27 CEST | Update | N/A |
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| article html file updated | 20 December 2017 09:27 CET | Original file | N/A |
| article xml uploaded. | 20 December 2017 09:25 CET | Original file | https://www.mdpi.com/2227-7102/7/4/91/xml |
| article pdf uploaded. | 20 December 2017 09:25 CET | Version of Record | https://www.mdpi.com/2227-7102/7/4/91/pdf |
