Collectanea Mathematica publishes original research peer reviewed papers of high quality in all fields of pure and applied mathematics. It is an international journal of the University of Barcelona and the oldest mathematical journal in Spain. It was founded in 1948 by José M. Orts. Previously self-published by the Institut de Matemàtica (IMUB) of the Universitat de Barcelona, as of 2011 it is published by Springer.
Weighted estimates for bilinear fractional integral operators: a necessary and sufficient condition for power weights
Yasuo Komori-Furuya (March 2019)
José F. Fernando (February 2019)
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