| article html file updated | 7 February 2020 21:51 CET | Update | https://www.mdpi.com/2227-7390/5/1/8 |
| article html file updated | 22 September 2019 23:29 CEST | Update | - |
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| article xml uploaded. | 14 March 2017 04:25 CET | Original file | https://www.mdpi.com/2227-7390/5/1/8/xml |
| article pdf uploaded. | 14 March 2017 04:25 CET | Updated version of record | https://www.mdpi.com/2227-7390/5/1/8/pdf |
| article pdf uploaded. | 20 January 2017 12:31 CET | Version of Record | https://www.mdpi.com/2227-7390/5/1/8/pdf-vor |