- Mehran J. and Olya H., Future Trend of Outbound Tourism Expenditure Modelling: A Review of Predictors and Analytical Approaches. 7th Advances in Hospitality and Tourism Marketing and Management conference. Famagusta. 10-15 July 2017.
- Olya H., and Alipour H. Second Home Tourism. The 5th Eastern Mediterranean Tourism Symposium. Cyprus. 22 & 23 April 2016.
- Olya, H., Does Weather Risk Mediate the Effect of Disconfirmation on Tourist Behavioral Intentions? 2017 Academy of Global Hospitality & Tourism Conference. Cheongju, S. Korea. May 26-28, 2017.
- Olya H., How to Operationalize Tourism Climate Insurance? 2nd International Tourism and Travel Studies Conference. Eastern Mediterranean Academic Research Centre. Istanbul, 20th Jun. 2015.
- Olya, H. GT., Valipour E., and Bazari H., Application of Indigenous knowledge in Sustainable Urban Design in Dry Climate, International Journal of Art and Science, New Britain, USA, 27th Nov. 2012.
- Dehghani M., Olya, H. GT., Pahlavanravi A., Nasrabadi A., Hadarbadi Gh., Prioritizing of watershed Management Operations In Catchments Using Fuzzy Logic and GIS; 5th International Conference on Land Degradation; Valenzano, Bari, Italy, 20th April, 2008.
- Olya, H. GT., Moghadamnia A., Assessment of Birjand Climate Conditions Using Scalogram Model; Conference on Severe Climate and Consequences, Birjand, Iran. July, 2007.