| article html file updated | 7 February 2020 07:13 CET | Update | https://www.mdpi.com/1420-3049/21/4/490 |
| article html file updated | 21 September 2019 15:04 CEST | Update | - |
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| article html file updated | 28 April 2016 11:54 CEST | Update | - |
| article html file updated | 13 April 2016 12:36 CEST | Original file | - |
| article xml uploaded. | 13 April 2016 12:34 CEST | Original file | https://www.mdpi.com/1420-3049/21/4/490/xml |
| article pdf uploaded. | 13 April 2016 12:34 CEST | Version of Record | https://www.mdpi.com/1420-3049/21/4/490/pdf |
