| article html file updated | 6 February 2020 02:05 CET | Update | https://www.mdpi.com/2075-4418/3/2/283 |
| article html file updated | 8 May 2019 05:11 CEST | Update | N/A |
| article html file updated | 20 March 2019 22:31 CET | Update | N/A |
| article html file updated | 17 June 2015 09:19 CEST | Original file | N/A |
| article pdf uploaded. | 16 May 2013 15:08 CEST | Updated version of record | https://www.mdpi.com/2075-4418/3/2/283/pdf |
| article pdf uploaded. | 15 May 2013 15:36 CEST | Version of Record | https://www.mdpi.com/2075-4418/3/2/283/pdf-vor |
