| article html file updated | 8 February 2020 02:10 CET | Update | https://www.mdpi.com/2220-9964/6/4/94 |
| article html file updated | 23 September 2019 23:50 CEST | Update | N/A |
| article html file updated | 4 May 2019 05:13 CEST | Update | N/A |
| article html file updated | 28 April 2017 08:11 CEST | Update | N/A |
| article html file updated | 27 March 2017 05:31 CEST | Update | N/A |
| article html file updated | 26 March 2017 22:28 CEST | Update | N/A |
| article html file updated | 25 March 2017 22:27 CET | Update | N/A |
| article html file updated | 24 March 2017 22:33 CET | Update | N/A |
| article html file updated | 24 March 2017 09:48 CET | Original file | N/A |
| article xml uploaded. | 24 March 2017 09:46 CET | Update | https://www.mdpi.com/2220-9964/6/4/94/xml |
| article pdf uploaded. | 24 March 2017 09:46 CET | Version of Record | https://www.mdpi.com/2220-9964/6/4/94/pdf |