@article {IOPORT.03548271,
    author       = {Oxspring, H.H. and LaMotte, L.R.},
    title        = {The design of incomplete multinomial samples: The nested case.},
    year         = {1977},
    journal      = {Technometrics},
    volume       = {19},
    issn         = {0040-1706},
    pages        = {59-63},
    publisher    = {American Statistical Association, Alexandria, VA},
    doi          = {10.2307/1268255},
    identifier   = {03548271},
}