Douglas S. Bridges. A Note on Morse's Lambda-Notation in Set Theory. Math. Log. Q., 24(8):113-114, 1978. [doi]
@article{Bridges78, title = {A Note on Morse's Lambda-Notation in Set Theory}, author = {Douglas S. Bridges}, year = {1978}, doi = {10.1002/malq.19780240802}, url = {http://dx.doi.org/10.1002/malq.19780240802}, researchr = {https://researchr.org/publication/Bridges78}, cites = {0}, citedby = {0}, journal = {Math. Log. Q.}, volume = {24}, number = {8}, pages = {113-114}, }