@article {gu2007biom,
	title = {On robustness and model flexibility in survival analysis: transformed hazards models and average effects},
	journal = {Biometrics},
	volume = {63},
	year = {2007},
	pages = {69-77},
	doi = {10.1111/j.1541-0420.2006.00679.x},
	author = {Gustafson, P.}
}
