| article html file updated | 8 February 2020 01:33 CET | Update | https://www.mdpi.com/2218-1997/3/1/25 |
| article html file updated | 4 May 2019 06:33 CEST | Update | - |
| article html file updated | 30 March 2017 03:37 CEST | Update | - |
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| article xml uploaded. | 17 March 2017 06:45 CET | Update | https://www.mdpi.com/2218-1997/3/1/25/xml |
| article pdf uploaded. | 17 March 2017 06:45 CET | Updated version of record | https://www.mdpi.com/2218-1997/3/1/25/pdf |
| article html file updated | 16 March 2017 04:04 CET | Original file | - |
| article pdf uploaded. | 16 March 2017 04:03 CET | Version of Record | https://www.mdpi.com/2218-1997/3/1/25/pdf-vor |
