@article{MS2_1973__33_166323,
     author = {E. Arjas and T.P. Speed},
     title = {Topics in {Markov} {Additive} {Processes.}},
     journal = {Mathematica Scandinavica},
     pages = {171--192},
     publisher = {mathdoc},
     volume = {33},
     year = {1973},
     zbl = {0277.60063},
     url = {http://geodesic.mathdoc.fr/item/MS2_1973__33_166323/}
}