| article html file updated | 29 August 2025 22:40 CEST | Update | https://www.mdpi.com/2297-8739/3/1/6 |
| article html file updated | 16 July 2022 01:43 CEST | Update | N/A |
| article html file updated | 7 February 2020 04:15 CET | Update | N/A |
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| article html file updated | 19 April 2016 11:56 CEST | Original file | N/A |
| article pdf uploaded. | 22 March 2016 13:51 CET | Updated version of record | https://www.mdpi.com/2297-8739/3/1/6/pdf |
| article pdf uploaded. | 4 February 2016 09:17 CET | Version of Record | https://www.mdpi.com/2297-8739/3/1/6/pdf-vor |
| article xml uploaded. | 4 February 2016 09:17 CET | Original file | https://www.mdpi.com/2297-8739/3/1/6/xml |
