| article html file updated | 9 February 2020 10:09 CET | Update | https://www.mdpi.com/2226-4787/6/1/24 |
| article html file updated | 1 October 2019 17:03 CEST | Update | - |
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| article xml uploaded. | 20 March 2018 07:43 CET | Update | https://www.mdpi.com/2226-4787/6/1/24/xml |
| article pdf uploaded. | 20 March 2018 07:43 CET | Updated version of record | https://www.mdpi.com/2226-4787/6/1/24/pdf |
| article html file updated | 16 March 2018 15:52 CET | Original file | - |
| article pdf uploaded. | 16 March 2018 15:51 CET | Version of Record | https://www.mdpi.com/2226-4787/6/1/24/pdf-vor |
