| article html file updated | 6 February 2020 08:20 CET | Update | https://www.mdpi.com/2220-9964/3/2/507 |
| article html file updated | 7 May 2019 16:27 CEST | Update | N/A |
| article html file updated | 21 March 2019 14:53 CET | Update | N/A |
| article html file updated | 20 August 2015 02:01 CEST | Update | N/A |
| article html file updated | 24 June 2014 12:12 CEST | Original file | N/A |
| article xml file uploaded | 24 June 2014 12:12 CEST | Original file | https://www.mdpi.com/2220-9964/3/2/507/xml |
| article pdf uploaded. | 14 April 2014 15:06 CEST | Updated version of record | https://www.mdpi.com/2220-9964/3/2/507/pdf |
| article pdf uploaded. | 2 April 2014 15:02 CEST | Version of Record | https://www.mdpi.com/2220-9964/3/2/507/pdf-vor |
