Johnson, R. (2020). Singular Perturbation Theory. Springer US.
Trích dẫn kiểu ChicagoJohnson, R.S. Singular Perturbation Theory. Springer US, 2020.
MLA citiranjeJohnson, R.S. Singular Perturbation Theory. Springer US, 2020.
Opozorilo: Ti citati niso vedno 100% točni.