1 Correction to: RACSAM (2021) 115:27 https://doi.org/10.1007/s13398-020-00967-4

Unfortunately, the reference 19 is updated incorrectly in the original article and the reference 19 should be

Ferrando, J.C., López-Pellicer, M., Sánchez Ruiz, L.M.: Metrizable Barrelled Spaces. Longman, Harlow (1995).

The original article was corrected.