TY  - RPRT
TI  - Constructing qualitatively derived theory: concept construction and concept typologies.
AU  - Janice M Morse
PY  - 2004
DO  - 10.1177/1049732304269676
UR  - https://pubmed.ncbi.nlm.nih.gov/15538006/
ID  - 15538006
ER  -