olemus
spiraalmudelil põhinev arendusprotsess
= development process based on the spiral model

ülevaateid
https://www.slideshare.net/slideshow/prototyping-model-evolution-and-spiral-modelspdf/255708174

https://www.ijeast.com/papers/311-316,Tesma512,IJEAST.pdf

https://www.kharagpurcollege.ac.in/studyMaterial/173327Lecture-5-spiral-model,%202nd%20semester%20by%20Alok%20Haldar.pdf

https://acs.ist.psu.edu/ist521/papers/boehmH01.pdf

https://insights.sei.cmu.edu/documents/5438/2000_003_001_13652.pdf

https://core.ac.uk/download/pdf/36694319.pdf