@article{JaentschiL57
,year = "2020"
,journal = "Symmetry"
,title = "A family of derivative free optimal fourth order methods for computing multiple roots"
,author = "Kumar, Sunil and Kumar, Deepak and Sharma, Janak R. and Jäntschi, Lorentz"
,volume = "12"
,number = "12"
,pages = "1969"
,ISSN = "2073-8994"
,doi = "10.3390/sym12121969"
,url = "http://lori.academicdirect.org/pdfs/400/323.pdf"
}