| article html file updated | 7 February 2020 07:16 CET | Update | https://www.mdpi.com/2220-9964/5/4/52 |
| article html file updated | 5 May 2019 18:38 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:53 CET | Update | N/A |
| article html file updated | 27 April 2016 10:23 CEST | Update | N/A |
| article html file updated | 14 April 2016 14:47 CEST | Original file | N/A |
| article xml uploaded. | 14 April 2016 14:46 CEST | Original file | https://www.mdpi.com/2220-9964/5/4/52/xml |
| article pdf uploaded. | 14 April 2016 14:46 CEST | Version of Record | https://www.mdpi.com/2220-9964/5/4/52/pdf |
