Here our new manuscript on the quantification of methane in lacustrine sediments:
Tyroller, L., Tomonaga, Y., Brennwald, M., Ndayisaba, C., Naeher, S., Schubert, C., North, R.P., & Kipfer, R. (2016). Improved method for the quantification of methane concentrations in unconsolidated lake sediments. Environ. Sci. Technol., doi:10.1021/acs.est.5b05292.