@article{AFM_1982_7_2_a5,
     author = {Heikki Haario},
     title = {On the range of real coefficients of functions with bounded boundary rotation},
     journal = {Annales Fennici Mathematici},
     pages = {165--176},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1982},
     doi = {10.5186/aasfm.1982.0718},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1982.0718/}
}