Improved multifrequency phase-modulation method that uses rectangular-wave signals to increase accuracy in luminescence spectroscopy

1. Medina-Rodríguez, S.
2. De La Torre-Vega, A.
3. Sainz-Gonzalo, F.J.
4. Marín-Suárez, M.
5. Elosúa, C.
6. Arregui, F.J.
7. Matias, I.R.
8. Fernández-Sánchez, J.F.
9. Fernández-Gutiérrez, A.