| article html file updated | 8 February 2020 01:36 CET | Update | https://www.mdpi.com/1999-4907/8/3/81 |
| article html file updated | 23 September 2019 20:37 CEST | Update | N/A |
| article html file updated | 4 May 2019 06:24 CEST | Update | N/A |
| article html file updated | 28 March 2017 03:48 CEST | Update | N/A |
| article html file updated | 17 March 2017 06:40 CET | Update | N/A |
| article xml uploaded. | 17 March 2017 06:39 CET | Update | https://www.mdpi.com/1999-4907/8/3/81/xml |
| article pdf uploaded. | 17 March 2017 06:39 CET | Updated version of record | https://www.mdpi.com/1999-4907/8/3/81/pdf |
| article html file updated | 16 March 2017 16:07 CET | Original file | N/A |
| article pdf uploaded. | 16 March 2017 16:06 CET | Version of Record | https://www.mdpi.com/1999-4907/8/3/81/pdf-vor |
