O'Donnell J. Discrete mathematics using a computer / J. O'Donnell, C. Hall, R. Page, 2006 r=on-line. - Текст : электронный.
Hall C. Hand function with special regard to work with tools : Neurophysiological biomechanical and ergonomic investigations of the hand / C.Hall, 1995. - 81 p. - Текст : непосредственный.
O'Donnell J. Discrete mathematics using a computer / J. O'Donnell, C. Hall, R. Page, 2006 r=on-line.