| article html file updated | 24 December 2025 13:36 CET | Update | https://www.mdpi.com/1996-1073/6/3/1618 |
| article html file updated | 28 September 2025 19:17 CEST | Update | N/A |
| article html file updated | 6 February 2020 00:55 CET | Update | N/A |
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| article html file updated | 14 April 2017 07:36 CEST | Original file | N/A |
| article pdf uploaded. | 11 March 2013 13:25 CET | Version of Record | https://www.mdpi.com/1996-1073/6/3/1618/pdf |
