| article html file updated | 6 February 2020 22:24 CET | Update | https://www.mdpi.com/2220-9964/4/3/1657 |
| article html file updated | 6 May 2019 12:09 CEST | Update | N/A |
| article html file updated | 26 March 2019 09:59 CET | Update | N/A |
| article html file updated | 14 October 2015 05:04 CEST | Original file | N/A |
| article xml file uploaded | 14 October 2015 05:04 CEST | Original file | https://www.mdpi.com/2220-9964/4/3/1657/xml |
| article pdf uploaded. | 2 September 2015 14:31 CEST | Version of Record | https://www.mdpi.com/2220-9964/4/3/1657/pdf |
