@article{10_37236_4899,
     author = {Rudi Pendavingh and Jorn van der Pol},
     title = {On the number of matroids compared to the number of sparse paving matroids},
     journal = {The electronic journal of combinatorics},
     year = {2015},
     volume = {22},
     number = {2},
     doi = {10.37236/4899},
     zbl = {1327.05056},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4899/}
}