Optimisation of focused ultrasound extraction (FUSE) and microwave-assisted extraction (MAE) of hydrocarbons in geological chert samples

1. Olivares, M.
2. Vallejo, A.
3. Irazola, M.
4. Murelaga, X.
5. Baceta, J.I.
6. Tarriño, A.
7. Etxebarria, N.