@article{Sobel1985,
author = {Sobel, M. and Hout, M. and Duncan, O.D.},
title= {Exchange, Structure, and Symmetry in Occupational Mobility},
year = {1985},
doi = {10.1086/228281},
journal = {American Journal of Sociology},
volume = {91},
number = {2},
pages = {359--372},
}