@article{10_1007_s10587_012_0077_7,
     author = {Shen, Guangjun and Yan, Litan and Chen, Chao},
     title = {Smoothness for the collision local time of two multidimensional bifractional {Brownian} motions},
     journal = {Czechoslovak Mathematical Journal},
     pages = {969--989},
     publisher = {mathdoc},
     volume = {62},
     number = {4},
     year = {2012},
     doi = {10.1007/s10587-012-0077-7},
     mrnumber = {3010251},
     zbl = {1274.60119},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1007/s10587-012-0077-7/}
}