| article html file updated | 7 February 2020 04:26 CET | Update | https://www.mdpi.com/2073-4441/8/2/56 |
| article html file updated | 6 May 2019 00:38 CEST | Update | N/A |
| article html file updated | 26 March 2019 20:28 CET | Original file | N/A |
| article pdf uploaded. | 3 March 2016 08:37 CET | Updated version of record | https://www.mdpi.com/2073-4441/8/2/56/pdf |
| article xml uploaded. | 3 March 2016 08:37 CET | Update | https://www.mdpi.com/2073-4441/8/2/56/xml |
| article pdf uploaded. | 6 February 2016 11:11 CET | Version of Record | https://www.mdpi.com/2073-4441/8/2/56/pdf-vor |
| article xml uploaded. | 6 February 2016 11:11 CET | Original file | N/A |
