| article html file updated | 7 February 2020 09:44 CET | Update | https://www.mdpi.com/2225-1146/4/2/26 |
| article html file updated | 5 May 2019 13:45 CEST | Update | - |
| article html file updated | 27 March 2019 06:40 CET | Update | - |
| article html file updated | 14 March 2018 10:12 CET | Update | - |
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| article html file updated | 3 June 2016 14:49 CEST | Original file | - |
| article xml uploaded. | 3 June 2016 14:47 CEST | Original file | https://www.mdpi.com/2225-1146/4/2/26/xml |
| article pdf uploaded. | 3 June 2016 14:47 CEST | Version of Record | https://www.mdpi.com/2225-1146/4/2/26/pdf |
