@article{10_1017_S0017089518000447,
     author = {YOKOI, KATSUYA},
     title = {LUSTERNIK{\textendash}SCHNIRELMANN {CATEGORY} {BASED} {ON} {THE} {DISCRETE} {CONLEY} {INDEX} {THEORY}},
     journal = {Glasgow mathematical journal},
     pages = {693--704},
     year = {2019},
     volume = {61},
     number = {3},
     doi = {10.1017/S0017089518000447},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089518000447/}
}