Erbe, L. (1995). Oscillation theory for functional differential: Equations. Dekker.
Citazione stile Chigago Style (17a edizione)Erbe, L.H. Oscillation Theory for Functional Differential: Equations. New York: Dekker, 1995.
Citatione MLA (9a ed.)Erbe, L.H. Oscillation Theory for Functional Differential: Equations. Dekker, 1995.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.