| article html file updated | 14 August 2026 20:26 CEST | Update | https://www.mdpi.com/1996-1073/11/1/15 |
| article html file updated | 9 February 2020 01:04 CET | Update | N/A |
| article html file updated | 29 September 2019 10:57 CEST | Update | N/A |
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| article html file updated | 23 December 2017 22:54 CET | Original file | N/A |
| article xml uploaded. | 23 December 2017 14:03 CET | Update | https://www.mdpi.com/1996-1073/11/1/15/xml |
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| article pdf uploaded. | 23 December 2017 14:03 CET | Version of Record | https://www.mdpi.com/1996-1073/11/1/15/pdf |
