| article html file updated | 7 February 2020 07:04 CET | Update | https://www.mdpi.com/1422-0067/17/4/539 |
| article html file updated | 21 September 2019 14:52 CEST | Update | - |
| article html file updated | 5 May 2019 19:01 CEST | Update | - |
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| article html file updated | 28 April 2016 05:11 CEST | Update | - |
| article html file updated | 9 April 2016 13:53 CEST | Original file | - |
| article xml uploaded. | 9 April 2016 13:52 CEST | Original file | https://www.mdpi.com/1422-0067/17/4/539/xml |
| article pdf uploaded. | 9 April 2016 13:52 CEST | Version of Record | https://www.mdpi.com/1422-0067/17/4/539/pdf |
