| article html file updated | 7 February 2020 06:29 CET | Update | https://www.mdpi.com/1420-3049/21/4/414 |
| article html file updated | 21 September 2019 14:02 CEST | Update | - |
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| article html file updated | 26 March 2016 15:22 CET | Original file | - |
| article xml uploaded. | 26 March 2016 15:21 CET | Original file | https://www.mdpi.com/1420-3049/21/4/414/xml |
| article pdf uploaded. | 26 March 2016 15:21 CET | Version of Record | https://www.mdpi.com/1420-3049/21/4/414/pdf |
