no. 3
Chain homotopy pullbacks and pushouts
Cahiers de topologie et géométrie différentielle, Tome 23 (1982) no. 3, pp. 269-278 
@article{CTGDC_1982__23_3_269_0,
     author = {Wong, Y. L.},
     title = {Chain homotopy pullbacks and pushouts},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {269--278},
     year = {1982},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {23},
     number = {3},
     mrnumber = {675338},
     zbl = {0503.55014},
     language = {en},
     url = {https://www.numdam.org/item/CTGDC_1982__23_3_269_0/}
}
TY  - JOUR
AU  - Wong, Y. L.
TI  - Chain homotopy pullbacks and pushouts
JO  - Cahiers de topologie et géométrie différentielle
PY  - 1982
SP  - 269
EP  - 278
VL  - 23
IS  - 3
PB  - Dunod éditeur, publié avec le concours du CNRS
UR  - https://www.numdam.org/item/CTGDC_1982__23_3_269_0/
LA  - en
ID  - CTGDC_1982__23_3_269_0
ER  - 
%0 Journal Article
%A Wong, Y. L.
%T Chain homotopy pullbacks and pushouts
%J Cahiers de topologie et géométrie différentielle
%D 1982
%P 269-278
%V 23
%N 3
%I Dunod éditeur, publié avec le concours du CNRS
%U https://www.numdam.org/item/CTGDC_1982__23_3_269_0/
%G en
%F CTGDC_1982__23_3_269_0
Wong, Y. L. Chain homotopy pullbacks and pushouts. Cahiers de topologie et géométrie différentielle, Tome 23 (1982) no. 3, pp. 269-278. https://www.numdam.org/item/CTGDC_1982__23_3_269_0/

1 K.H. Kamps, Note on normal sequences of chain complexes, Colloquium Math. XXXIX (1978), 225- 227. | Zbl | MR

2 M. Mather, Pullbacks in homotopy theory, Canad. J. Math. 28 (1976), 225 - 263. | Zbl | MR

3 C.B. Sp Encer, An abstract setting for homotopy pushouts and pullbacks, Cahiers Top. et Géom. Diff. XVIII-4 (1977), 409-430. | Zbl | MR | Numdam

4 M. Walker, Homotopy pullbacks and applications to duality, Canad. J. Math. 29 (1977), 45-65. | Zbl | MR

5 M. Walker, Homotopy pullbacks and the Hopf invariant, J. London Math. Soc. (2), 19 (1979), 153- 158. | Zbl | MR

6 Y.L. Wong & C.B. Spencer, Pullback and pushout squares in a special double category with connection, Typescript, Univ. of Hong-Kong.