| article html file updated | 7 February 2020 06:34 CET | Update | https://www.mdpi.com/1420-3049/21/4/426 |
| article html file updated | 21 September 2019 14:11 CEST | Update | - |
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| article html file updated | 28 April 2016 11:32 CEST | Update | - |
| article html file updated | 29 March 2016 12:19 CEST | Original file | - |
| article xml uploaded. | 29 March 2016 12:18 CEST | Original file | https://www.mdpi.com/1420-3049/21/4/426/xml |
| article pdf uploaded. | 29 March 2016 12:18 CEST | Version of Record | https://www.mdpi.com/1420-3049/21/4/426/pdf |
