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@article{PIM_1979_N_S_26_40_a21, author = {{\DJ}uro Kurepa}, title = {On {Some} {Intercalations} {In} {Ordered} {Sets}}, journal = {Publications de l'Institut Math\'ematique}, pages = {157 }, publisher = {mathdoc}, volume = {_N_S_26}, number = {40}, year = {1979}, url = {http://geodesic.mathdoc.fr/item/PIM_1979_N_S_26_40_a21/} }
Đuro Kurepa. On Some Intercalations In Ordered Sets. Publications de l'Institut Mathématique, _N_S_26 (1979) no. 40, p. 157 . http://geodesic.mathdoc.fr/item/PIM_1979_N_S_26_40_a21/