Berrio, Silvia Spairani, and Josep Roca Cladera. "Use of the Conjoint Analysis Technique to Establish the Perceived Quality of Building Materials in the Residential Use - Preliminary Studies." In 20th Annual European Real Estate Society Conference. ERES: Conference. Vienna, Austria, 2013.

Berrio, Silvia Spairani, Eva María Gar Alcocel, and Josep Roca Cladera. "A CLOSE LOOK AT THE EXPERTíS PERCEPTION OF THE SUITABILITY OF CONSTRUCTION MATERIALS FOR RESIDENTIAL USE. PRELIMINARY STUDIES." In 17th Annual European Real Estate Society Conference. ERES: Conference. Milan, Italy, 2010.

Burns, Malcolm, and Josep Roca Cladera. "Contrasting indications of Polycentrism within Spainís Metropolitan Urban Regions." In 8th European Real Estate Society Conference. ERES: Conference. Alicante, Spain, 2001.

M Almirall, Pilar García, and Josep Roca Cladera. "Geographical information system techniques in the analysis of the formation of office property values in Barcelona." In 8th European Real Estate Society Conference. ERES: Conference. Alicante, Spain, 2001.

Cladera, Josep Roca, Pilar Garcia Almirall, and Malcolm Burns. "An Economic Evaluation Model of the Environmental Quality of the City." In 6th European Real Estate Society Conference. ERES: Conference. Athens, Greece, 1999.

Cladera, Josep Roca, and Malcolm Burns. "First Time Buyers Access to Housing within Barcelona's Metropolitan Area." In 5th European Real Estate Society Conference. ERES: Conference. Maastricht, The Netherlands, 1998.

Cladera, Josep Roca, and Malcolm Burns. "The Liberalisation of the Land Marker in Spain." In 5th European Real Estate Society Conference. ERES: Conference. Maastricht, The Netherlands, 1998.