| article html file updated | 9 February 2020 07:14 CET | Update | https://www.mdpi.com/2225-1146/6/1/8 |
| article html file updated | 30 September 2019 22:48 CEST | Update | N/A |
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| article xml uploaded. | 22 February 2018 10:04 CET | Original file | https://www.mdpi.com/2225-1146/6/1/8/xml |
| article pdf uploaded. | 22 February 2018 10:04 CET | Version of Record | https://www.mdpi.com/2225-1146/6/1/8/pdf |