| article html file updated | 8 February 2020 23:13 CET | Update | https://www.mdpi.com/2227-7102/7/4/87 |
| article html file updated | 29 September 2019 00:16 CEST | Update | - |
| article html file updated | 2 May 2019 10:28 CEST | Update | - |
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| article html file updated | 2 January 2018 11:22 CET | Update | - |
| article html file updated | 5 December 2017 15:57 CET | Original file | - |
| article xml uploaded. | 5 December 2017 15:56 CET | Original file | https://www.mdpi.com/2227-7102/7/4/87/xml |
| article pdf uploaded. | 5 December 2017 15:56 CET | Version of Record | https://www.mdpi.com/2227-7102/7/4/87/pdf |
