@article{MS2_1973__32_166300,
     author = {Maurice Heins},
     title = {On a {Theorem} of {Study} {Concerning} {Conformal} {Maps} with {Convex} {Images} {II.}},
     journal = {Mathematica Scandinavica},
     pages = {245--257},
     publisher = {mathdoc},
     volume = {32},
     year = {1973},
     zbl = {0271.30009},
     url = {http://geodesic.mathdoc.fr/item/MS2_1973__32_166300/}
}