TY  - JOUR
AU  - Tomonori Fukunaga
TI  - Homotopy classification of nanophrases 
 with at most four letters
JO  - Fundamenta Mathematicae
PY  - 2011
SP  - 101
EP  - 118
VL  - 214
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/fm214-2-1/
DO  - 10.4064/fm214-2-1
LA  - en
ID  - 10_4064_fm214_2_1
ER  -