| article html file updated | 7 February 2020 06:11 CET | Update | https://www.mdpi.com/1420-3049/21/3/391 |
| article html file updated | 21 September 2019 13:34 CEST | Update | N/A |
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| article html file updated | 26 March 2019 23:57 CET | Update | N/A |
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| article html file updated | 31 March 2016 03:01 CEST | Original file | N/A |
| article xml uploaded. | 21 March 2016 11:22 CET | Original file | https://www.mdpi.com/1420-3049/21/3/391/xml |
| article pdf uploaded. | 21 March 2016 11:22 CET | Version of Record | https://www.mdpi.com/1420-3049/21/3/391/pdf |
