| article html file updated | 6 February 2020 08:37 CET | Update | https://www.mdpi.com/2076-0787/3/2/132 |
| article html file updated | 20 September 2019 07:25 CEST | Update | N/A |
| article html file updated | 7 May 2019 15:50 CEST | Update | N/A |
| article html file updated | 21 March 2019 15:34 CET | Update | N/A |
| article html file updated | 18 January 2017 06:44 CET | Original file | N/A |
| article pdf uploaded. | 23 April 2014 10:31 CEST | Updated version of record | https://www.mdpi.com/2076-0787/3/2/132/pdf |
| article pdf uploaded. | 15 April 2014 15:26 CEST | Version of Record | https://www.mdpi.com/2076-0787/3/2/132/pdf-vor |
