@article{MS2_1965__16_165908,
     author = {J\"orgen L\"ofstr\"om},
     title = {On {Certain} {Interpolation} {Spaces} {Related} to {Generalized} {Semi-Groups.}},
     journal = {Mathematica Scandinavica},
     pages = {41--54},
     publisher = {mathdoc},
     volume = {16},
     year = {1965},
     zbl = {0128.35104},
     url = {http://geodesic.mathdoc.fr/item/MS2_1965__16_165908/}
}