| article html file updated | 8 February 2020 02:11 CET | Update | https://www.mdpi.com/1420-3049/22/4/521 |
| article html file updated | 23 September 2019 23:58 CEST | Update | - |
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| article xml uploaded. | 24 March 2017 12:18 CET | Original file | https://www.mdpi.com/1420-3049/22/4/521/xml |
| article pdf uploaded. | 24 March 2017 12:18 CET | Version of Record | https://www.mdpi.com/1420-3049/22/4/521/pdf |
