@article{10_1017_S001708950500282X,
     author = {CHAVAN, SAMEER and ATHAVALE, AMEER},
     title = {ON {A} {FRIEDRICHS} {EXTENSION} {RELATED} {TO} {UNBOUNDED} {SUBNORMAL} {OPERATORS}},
     journal = {Glasgow mathematical journal},
     pages = {19--28},
     year = {2006},
     volume = {48},
     number = {1},
     doi = {10.1017/S001708950500282X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950500282X/}
}