| article html file updated | 7 February 2020 06:22 CET | Update | https://www.mdpi.com/1660-3397/14/4/61 |
| article html file updated | 5 May 2019 20:30 CEST | Update | - |
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| article html file updated | 28 April 2016 13:41 CEST | Update | - |
| article html file updated | 25 March 2016 05:17 CET | Original file | - |
| article xml uploaded. | 25 March 2016 05:16 CET | Original file | https://www.mdpi.com/1660-3397/14/4/61/xml |
| article pdf uploaded. | 25 March 2016 05:16 CET | Version of Record | https://www.mdpi.com/1660-3397/14/4/61/pdf |
