| article html file updated | 12 August 2026 19:01 CEST | Update | https://www.mdpi.com/1999-4907/4/2/218 |
| article html file updated | 6 February 2020 01:29 CET | Update | N/A |
| article html file updated | 8 May 2019 06:20 CEST | Update | N/A |
| article html file updated | 20 March 2019 20:56 CET | Update | N/A |
| article html file updated | 17 June 2015 08:22 CEST | Original file | N/A |
| article pdf uploaded. | 12 April 2013 16:39 CEST | Updated version of record | https://www.mdpi.com/1999-4907/4/2/218/pdf |
| article pdf uploaded. | 11 April 2013 15:19 CEST | Version of Record | https://www.mdpi.com/1999-4907/4/2/218/pdf-vor |
