@misc{indiciae3df9b72630b8, title = {A sample size program for "proving the null hypothesis".}, author = {C Heiselbetz and L Edler}, year = {1987}, doi = {10.1016/0197-2456(87)90024-9}, url = {https://pubmed.ncbi.nlm.nih.gov/3568695/}, note = {Source identifier: 3568695} }