@article{701868,
     title = {On commutativity of interpolation with intersection},
     booktitle = {Proceedings of the 13th Winter School on Abstract Analysis},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1985},
     pages = {113-118},
     mrnumber = {MR0894276},
     zbl = {0616.41001},
     url = {http://dml.mathdoc.fr/item/701868}
}

Maligranda, Lech. On commutativity of interpolation with intersection, dans Proceedings of the 13th Winter School on Abstract Analysis, GDML_Books,  (1985), pp. 113-118. http://gdmltest.u-ga.fr/item/701868/