In his prolific professional career, Mitjans used study and reference as his main design tools. When he designed Barcelona’s football stadium, Camp Nou, he travelled all around Europe visiting other stadiums and gathered documents and postcards of them. In 1968, he participated in the competition for the new Telefónica headquarters in Fuentelarreina (Madrid), and had El Escorial, Mies or Harrison on his drawing board. In the definitive version of the Atlántico building at the junction between Calle Balmes and Avenida Diagonal de Barcelona, his gaze turned to Gio Ponti. However, in his first works on dwellings, also in Barcelona, his referent was Raimon Duran i Reynals, who followed the aesthetics of US architect Charles Platt for the composition of façades. Thus, in 1944, next to Turó Park in Barcelona, Mitjans created a work in brick and artificial stone, with a flat façade and two dwellings per landing. Sometime later, he would design another building on an adjacent plot with a different dwelling typology. However, the façade was similar and provided a united, unique canvas that would help to give a uniform character to the green space of the urban park, Turó Park.