@article{10_4153_CJM_1968_126_9,
     author = {Goodman, Ruth},
     title = {Sets of {Polynomials} {Orthogonal} {Simultaneously} on {Four} {Ellipses}},
     journal = {Canadian journal of mathematics},
     pages = {1281--1294},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-126-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-126-9/}
}