| article html file updated | 6 February 2020 18:15 CET | Update | https://www.mdpi.com/2305-6320/2/2/55 |
| article html file updated | 6 May 2019 20:47 CEST | Update | N/A |
| article html file updated | 26 March 2019 01:49 CET | Update | N/A |
| article html file updated | 21 August 2015 11:29 CEST | Original file | N/A |
| article pdf uploaded. | 4 May 2015 10:20 CEST | Updated version of record | https://www.mdpi.com/2305-6320/2/2/55/pdf |
| article pdf uploaded. | 30 April 2015 15:19 CEST | Version of Record | https://www.mdpi.com/2305-6320/2/2/55/pdf-vor |
