Sigvald, Roland
- Department of Ecology, Swedish University of Agricultural Sciences
                                Publisher: Indian Potato Association, Central Potato Research Institute (Indian Council of Agricultural Researc), Shimla-171 001 (H.P.) India
                            
Global Potato Conference 2008- Opportunities and Challenges in the New Millennium
                                Agricultural Science
                            
https://res.slu.se/id/publ/19846