| article html file updated | 13 August 2026 09:22 CEST | Update | https://www.mdpi.com/2225-1154/3/1/42 |
| article html file updated | 6 February 2020 14:42 CET | Update | N/A |
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| article pdf uploaded. | 29 December 2014 10:01 CET | Updated version of record | https://www.mdpi.com/2225-1154/3/1/42/pdf |
| article pdf uploaded. | 23 December 2014 15:20 CET | Version of Record | https://www.mdpi.com/2225-1154/3/1/42/pdf-vor |
