| article html file updated | 6 February 2020 06:43 CET | Update | https://www.mdpi.com/2220-9964/3/1/18 |
| article html file updated | 7 May 2019 19:49 CEST | Update | N/A |
| article html file updated | 21 March 2019 11:00 CET | Update | N/A |
| article html file updated | 19 August 2015 17:19 CEST | Update | N/A |
| article html file updated | 15 January 2014 15:09 CET | Original file | N/A |
| article xml uploaded. | 15 January 2014 15:09 CET | Original file | https://www.mdpi.com/2220-9964/3/1/18/xml |
| article pdf uploaded. | 15 January 2014 15:09 CET | Updated version of record | https://www.mdpi.com/2220-9964/3/1/18/pdf |
| article pdf uploaded. | 14 January 2014 09:45 CET | Version of Record | https://www.mdpi.com/2220-9964/3/1/18/pdf-vor |
