@misc{indiciae6f7005c92f89,
  title = {Perturbing Hele-Shaw flow with a small gap gradient.},
  author = {H Zhao and J Casademunt and C Yeung and JV Maher},
  year = {1992},
  doi = {10.1103/physreva.45.2455},
  url = {https://pubmed.ncbi.nlm.nih.gov/9907268/},
  note = {Source identifier: 9907268}
}