| article html file updated | 8 February 2020 23:25 CET | Update | https://www.mdpi.com/2227-7102/7/4/88 |
| article html file updated | 29 September 2019 01:25 CEST | Update | N/A |
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| article html file updated | 7 December 2017 12:13 CET | Original file | N/A |
| article xml uploaded. | 7 December 2017 12:12 CET | Original file | https://www.mdpi.com/2227-7102/7/4/88/xml |
| article pdf uploaded. | 7 December 2017 12:12 CET | Version of Record | https://www.mdpi.com/2227-7102/7/4/88/pdf |
