TY  - RPRT
TI  - Ideal concentrators with gaps.
AU  - Julio Chaves
AU  - Manuel Collares-Pereira
PY  - 2002
DO  - 10.1364/ao.41.001267
UR  - https://pubmed.ncbi.nlm.nih.gov/11900003/
ID  - 11900003
ER  -