| article html file updated | 7 February 2020 23:32 CET | Update | https://www.mdpi.com/2304-8158/6/2/13 |
| article html file updated | 23 September 2019 08:43 CEST | Update | N/A |
| article html file updated | 4 May 2019 10:58 CEST | Update | N/A |
| article html file updated | 2 March 2017 10:20 CET | Update | N/A |
| article html file updated | 16 February 2017 10:36 CET | Original file | N/A |
| article xml uploaded. | 16 February 2017 10:35 CET | Original file | https://www.mdpi.com/2304-8158/6/2/13/xml |
| article pdf uploaded. | 16 February 2017 10:35 CET | Version of Record | https://www.mdpi.com/2304-8158/6/2/13/pdf |
