| article html file updated | 13 August 2026 05:42 CEST | Update | https://www.mdpi.com/2227-9059/2/4/247 |
| article html file updated | 6 February 2020 12:59 CET | Update | N/A |
| article html file updated | 22 March 2019 03:04 CET | Update | N/A |
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| article html file updated | 20 August 2015 23:49 CEST | Original file | N/A |
| article pdf uploaded. | 21 October 2014 13:24 CEST | Updated version of record | https://www.mdpi.com/2227-9059/2/4/247/pdf |
| article pdf uploaded. | 21 October 2014 11:04 CEST | Version of Record | https://www.mdpi.com/2227-9059/2/4/247/pdf-vor |
