Volumetric multiple optical traps produced by Devil’s lensesWalter D. Furlan, Fernando Giménez, Arnau Calatayud, Laura Remón and Juan A. MonsoriuJ. Eur. Opt. Soc.-Rapid Publ., 5 (2010) 10037sDOI: https://doi.org/10.2971/jeos.2010.10037s