| article html file updated | 6 February 2020 12:03 CET | Update | https://www.mdpi.com/2076-0752/3/3/335 |
| article html file updated | 20 September 2019 12:37 CEST | Update | N/A |
| article html file updated | 22 March 2019 00:28 CET | Update | N/A |
| article html file updated | 22 March 2017 08:03 CET | Original file | N/A |
| article pdf uploaded. | 8 September 2014 16:07 CEST | Updated version of record | https://www.mdpi.com/2076-0752/3/3/335/pdf |
| article pdf uploaded. | 8 September 2014 13:23 CEST | Updated version of record | N/A |
| article pdf uploaded. | 8 September 2014 12:56 CEST | Updated version of record | N/A |
| article pdf uploaded. | 8 September 2014 11:34 CEST | Updated version of record | N/A |
| article pdf uploaded. | 8 September 2014 10:48 CEST | Version of Record | N/A |
