@article{oai:tsukuba.repo.nii.ac.jp:00016038,
 author = {Hardie, K.A. and Kamps, K.H.},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {201--220},
 title = {Secondary composition operations in homotopy pair theory},
 volume = {17},
 year = {1993}
}