| article html file updated | 14 August 2026 13:53 CEST | Update | https://www.mdpi.com/1422-0067/18/4/840 |
| article html file updated | 8 February 2020 03:41 CET | Update | N/A |
| article html file updated | 24 September 2019 08:19 CEST | Update | N/A |
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| article html file updated | 18 April 2017 12:58 CEST | Original file | N/A |
| article xml uploaded. | 18 April 2017 12:57 CEST | Original file | https://www.mdpi.com/1422-0067/18/4/840/xml |
| article pdf uploaded. | 18 April 2017 12:57 CEST | Updated version of record | https://www.mdpi.com/1422-0067/18/4/840/pdf |
| article pdf uploaded. | 15 April 2017 10:09 CEST | Version of Record | https://www.mdpi.com/1422-0067/18/4/840/pdf-vor |
