| article html file updated | 8 February 2020 21:39 CET | Update | https://www.mdpi.com/2227-9717/5/4/73 |
| article html file updated | 28 September 2019 14:28 CEST | Update | N/A |
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| article html file updated | 20 November 2017 08:48 CET | Original file | N/A |
| article xml uploaded. | 20 November 2017 08:46 CET | Original file | https://www.mdpi.com/2227-9717/5/4/73/xml |
| article pdf uploaded. | 20 November 2017 08:46 CET | Version of Record | https://www.mdpi.com/2227-9717/5/4/73/pdf |
