| article html file updated | 9 February 2020 04:22 CET | Update | https://www.mdpi.com/2227-7072/6/1/13 |
| article html file updated | 30 September 2019 05:33 CEST | Update | - |
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| article xml uploaded. | 30 January 2018 07:19 CET | Update | https://www.mdpi.com/2227-7072/6/1/13/xml |
| article pdf uploaded. | 30 January 2018 07:19 CET | Updated version of record | https://www.mdpi.com/2227-7072/6/1/13/pdf |
| article html file updated | 29 January 2018 06:55 CET | Original file | - |
| article xml uploaded. | 29 January 2018 06:53 CET | Update | - |
| article xml uploaded. | 29 January 2018 06:53 CET | Original file | - |
| article pdf uploaded. | 29 January 2018 06:53 CET | Updated version of record | https://www.mdpi.com/2227-7072/6/1/13/pdf-vor |
| article pdf uploaded. | 25 January 2018 17:18 CET | Version of Record | https://www.mdpi.com/2227-7072/6/1/13/pdf-vor |