Lamb AH. Target dependency of developing motoneurons in Xenopus laevis. J Comp Neurol. 1981; 203:157–71.
256
Tanaka H, Landmesser LT. Cell death of lumbosacral motoneurons in chick, quail, and chick-quail chimera embryos: a test of the quantitative matching hypothesis of neuronal cell death. J Neurosci. 1986; 6:2889–99.