@article{IJAMCS_2001_11_5_a7,
     author = {Enqvist, P.},
     title = {A {Homotopy} {Approach} to {Rational} {Covariance} {Extension} {With} {Degree} {Constraint}},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {1173--1201},
     publisher = {mathdoc},
     volume = {11},
     number = {5},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2001_11_5_a7/}
}