@article{10_4153_CJM_1975_110_0,
     author = {Halbhavi, I. G. and Varadarajan, K.},
     title = {Gottlieb {Sets} and {Duality} in {Homotopy} {Theory}},
     journal = {Canadian journal of mathematics},
     pages = {1042--1055},
     year = {1975},
     volume = {27},
     number = {5},
     doi = {10.4153/CJM-1975-110-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-110-0/}
}