I. Ginzburg, и K. Steiner. Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 360 (1792):
453--66(марта 2002)
J. Chin, E. Boek, и P. Coveney. Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences, 360 (1792):
547--58(марта 2002)