@article{FORUM_1997__9_2_141800,
     author = {Ivor McGillivray},
     title = {A recurrence condition for some subordinated strongly local {Dirichlet} forms.},
     journal = {Forum mathematicum},
     pages = {229--246},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1997},
     zbl = {0972.60504},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1997__9_2_141800/}
}