| article html file updated | 7 February 2020 07:29 CET | Update | https://www.mdpi.com/1420-3049/21/4/512 |
| article html file updated | 21 September 2019 15:28 CEST | Update | - |
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| article html file updated | 28 April 2016 12:01 CEST | Update | - |
| article html file updated | 19 April 2016 14:49 CEST | Original file | - |
| article xml uploaded. | 19 April 2016 14:47 CEST | Original file | https://www.mdpi.com/1420-3049/21/4/512/xml |
| article pdf uploaded. | 19 April 2016 14:47 CEST | Version of Record | https://www.mdpi.com/1420-3049/21/4/512/pdf |
