| article html file updated | 13 August 2026 15:13 CEST | Update | https://www.mdpi.com/2077-1444/6/1/139 |
| article html file updated | 6 February 2020 16:21 CET | Update | N/A |
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| article html file updated | 21 August 2015 08:18 CEST | Original file | N/A |
| article pdf uploaded. | 5 March 2015 12:05 CET | Version of Record | https://www.mdpi.com/2077-1444/6/1/139/pdf |
