| article html file updated | 9 February 2020 02:37 CET | Update | https://www.mdpi.com/2076-0787/7/1/6 |
| article html file updated | 2 May 2019 03:09 CEST | Update | - |
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| article pdf uploaded. | 16 January 2018 03:47 CET | Updated version of record | https://www.mdpi.com/2076-0787/7/1/6/pdf |
| article html file updated | 10 January 2018 17:44 CET | Original file | - |
| article xml uploaded. | 10 January 2018 17:42 CET | Original file | https://www.mdpi.com/2076-0787/7/1/6/xml |
| article pdf uploaded. | 10 January 2018 17:42 CET | Version of Record | https://www.mdpi.com/2076-0787/7/1/6/pdf-vor |
