authentic souces which say that others (bhakthi yŏgam (path of devotion), dhĕṣavāsam (residing in a divine abode), thirunāma sangīrthanam (reciting divine names of emperumān) etc) are the means —
those authentic souces which say that karma yŏgam (path of carrying out of deeds), which is the rule for gruhastham (way of life for married people) and which is accepted by ṣāsthras, is the means [for attaining mŏksham] —